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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#417201#6746. Merge the Rectanglesericmegalovania#AC ✓192ms29548kbC++202.3kb2024-05-22 16:07:062024-05-22 16:07:06

Judging History

你现在查看的是最新测评结果

  • [2024-05-22 16:07:06]
  • 评测
  • 测评结果:AC
  • 用时:192ms
  • 内存:29548kb
  • [2024-05-22 16:07:06]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;

#define ONLINE
#ifndef ONLINE
#define debug(...) fprintf(stderr,##__VA_ARGS__)
#else
#define debug(...) ;
#endif

using LL=long long;
using PII=pair<int,int>;

template<typename T>
inline T READ(){
	T x=0; bool f=0; char c=getchar();
	while(!isdigit(c)) f|=(c=='-'),c=getchar();
	while(isdigit(c)) x=x*10+c-'0',c=getchar();
	return f?-x:x;
}
inline int read(){return READ<int>();}
inline LL readLL(){return READ<LL>();}
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

#define N 1600
int n,m;
char row[N][N],col[N][N];
int tor[N][N],tod[N][N];

bool dfs(int rx,int ry,int cx,int cy){
	debug("%d %d %d %d\n",rx,ry,cx,cy);
	vector<int>r{rx-1},c{cx-1};
	bool _=1;//whether empty
	for(int i=rx;i<ry;i++){
//		debug("tor[%d][%d]=%d\n",i,cx,tor[i][cx]);
		if(tor[i][cx]>=cy) r.push_back(i);
		if(tor[i][cx]) _=0;
	}
	r.push_back(ry);
	for(int i=cx;i<cy;i++){
//		debug("tod[%d][%d]=%d\n",rx,i,tod[rx][i]);
		if(tod[rx][i]>=ry) c.push_back(i);
		if(tod[rx][i]) _=0;
	}
	c.push_back(cy);
	debug("_=%d\n",_);
	if(_) return 1;
	if(r.size()==2 && c.size()==2) return 0;
//	debug("r|"); for(int x:r) debug("%d ",x); debug("\n");
//	debug("c|"); for(int x:c) debug("%d ",x); debug("\n");
	for(int i=1;i<r.size();i++){
		for(int j=1;j<c.size();j++){
			if(r[i-1]+1==rx && r[i]==ry && c[j-1]+1==cx && c[j]==cy) continue;
			if(!dfs(r[i-1]+1,r[i],c[j-1]+1,c[j])) return 0;
		}
	}
	return 1;
}

int main(){
	n=read(),m=read();
	for(int i=1;i<n;i++){
		scanf("%s",row[i]+1);
	}
	for(int i=1;i<=n;i++){
		scanf("%s",col[i]+1);
	}
	for(int i=1;i<n;i++){
		for(int j=m;j>0;j--){
			if(row[i][j]=='0') tor[i][j]=0;
			else tor[i][j]=max(j,tor[i][j+1]);
		}
	}
	for(int j=1;j<m;j++){
		for(int i=n;i>0;i--){
			if(col[i][j]=='0') tod[i][j]=0;
			else tod[i][j]=max(i,tod[i+1][j]);
		}
	}
	printf("%s\n",dfs(1,n,1,m)?"YES":"NO");
//	for(int i=1;i<n;i++){
//		for(int j=1;j<=m;j++){
//			debug("%d ",tor[i][j]);
//		}
//		debug("\n");
//	}
//	for(int i=1;i<=n;i++){
//		for(int j=1;j<m;j++){
//			debug("%d ",tod[i][j]);
//		}
//		debug("\n");
//	}
	return 0;
}

/* stuff you should look for
* int overflow, array bounds
* special cases (n=1?)
* do smth instead of nothing and stay organized
* WRITE STUFF DOWN
* DON'T GET STUCK ON ONE APPROACH
*/

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 9996kb

input:

3 4
0000
0111
101
101
110

output:

YES

result:

ok answer is YES

Test #2:

score: 0
Accepted
time: 1ms
memory: 10144kb

input:

3 3
110
011
01
11
10

output:

NO

result:

ok answer is NO

Test #3:

score: 0
Accepted
time: 11ms
memory: 28640kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #4:

score: 0
Accepted
time: 137ms
memory: 28308kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #5:

score: 0
Accepted
time: 15ms
memory: 28060kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #6:

score: 0
Accepted
time: 22ms
memory: 29004kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #7:

score: 0
Accepted
time: 77ms
memory: 28232kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #8:

score: 0
Accepted
time: 22ms
memory: 28672kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #9:

score: 0
Accepted
time: 17ms
memory: 28056kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #10:

score: 0
Accepted
time: 141ms
memory: 27996kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #11:

score: 0
Accepted
time: 142ms
memory: 28160kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #12:

score: 0
Accepted
time: 147ms
memory: 28068kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #13:

score: 0
Accepted
time: 78ms
memory: 28212kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #14:

score: 0
Accepted
time: 149ms
memory: 29548kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #15:

score: 0
Accepted
time: 146ms
memory: 28944kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #16:

score: 0
Accepted
time: 104ms
memory: 28048kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #17:

score: 0
Accepted
time: 120ms
memory: 27940kb

input:

1500 1500
01111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #18:

score: 0
Accepted
time: 146ms
memory: 28944kb

input:

1500 1500
10111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #19:

score: 0
Accepted
time: 142ms
memory: 28500kb

input:

1500 1500
01111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #20:

score: 0
Accepted
time: 62ms
memory: 27436kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #21:

score: 0
Accepted
time: 62ms
memory: 28376kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #22:

score: 0
Accepted
time: 142ms
memory: 28904kb

input:

1500 1500
01111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #23:

score: 0
Accepted
time: 149ms
memory: 28736kb

input:

1500 1500
10111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #24:

score: 0
Accepted
time: 97ms
memory: 27992kb

input:

1500 1500
01111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #25:

score: 0
Accepted
time: 106ms
memory: 27988kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #26:

score: 0
Accepted
time: 146ms
memory: 28904kb

input:

1500 1500
01111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #27:

score: 0
Accepted
time: 147ms
memory: 28940kb

input:

1500 1500
11011111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #28:

score: 0
Accepted
time: 69ms
memory: 28740kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #29:

score: 0
Accepted
time: 106ms
memory: 28884kb

input:

1500 1500
00010000000000011110111101011011110011001110011110011101111011110111000111000110001101111011110101100011011110111101000011110111101110011110000001111011110111101111011100111100110000010110101111011110110000000001100011101111011000011001111011100110001111011110011101111011110111100000011110...

output:

YES

result:

ok answer is YES

Test #30:

score: 0
Accepted
time: 123ms
memory: 28888kb

input:

1500 1500
11100111101111011110000101000011110011101111001000001101111011110111000100011110110100101000000011001110000110111101110011110111101111011110111001000011110110001111001010110000011011110110001111010010111101111011110111000000001110111101111001010111000111000000110000000011000111000001011110...

output:

YES

result:

ok answer is YES

Test #31:

score: 0
Accepted
time: 121ms
memory: 28692kb

input:

1500 1500
11110111101111011110111101111001110000000111011110111101110011100111101101011000111100000000000111101111011110000001110000010111101000011100111101101001100110001111011110100001111011110101101110011000000001110011110111101110001100111101111011110000100000011010111101111011010111101110000000...

output:

YES

result:

ok answer is YES

Test #32:

score: 0
Accepted
time: 75ms
memory: 28800kb

input:

1500 1500
11100000000000000011100000000000000000000001110000000000000000000000000000000000000000000000001110000000000000000000000000001110000000000000000000011100000000111100000011100000011100000000000000000000000000000000000000000011100000000000000000000000001111000000000000000000000000000000000000...

output:

NO

result:

ok answer is NO

Test #33:

score: 0
Accepted
time: 81ms
memory: 28720kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000111000000000000000000000000000000000000000000000000011100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #34:

score: 0
Accepted
time: 80ms
memory: 28212kb

input:

1500 1500
00011100000001111000000000000011111100000000000000000000000000000000111000000011100000000001110000111111000000000000000001111000000000000000011110000000000000000000000000000000000000111111001110000000000000001111000000000000000111000000000000000000000000000000111000000000000111000000000000...

output:

YES

result:

ok answer is YES

Test #35:

score: 0
Accepted
time: 26ms
memory: 28676kb

input:

1500 1500
00000000000000000011100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001110000000000000000000000000000000011110000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011100000...

output:

NO

result:

ok answer is NO

Test #36:

score: 0
Accepted
time: 29ms
memory: 28868kb

input:

1500 1500
00000000011100111100000000000000000000000000000000000000000000000000000111000000000000001110001110000000000001111111101110000000000000000000001111000000011100000000000000000000000000000000000000000011100000111000000000000000001111000000000000000000000000000000000011111000000000000000000000...

output:

NO

result:

ok answer is NO

Test #37:

score: 0
Accepted
time: 86ms
memory: 28604kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000001110000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011100000000000000000000000...

output:

YES

result:

ok answer is YES

Test #38:

score: 0
Accepted
time: 84ms
memory: 28056kb

input:

1500 1500
00001110000000000000000011100000000000000000000000000000000111100000000000001111000111000000000000000000000000111000000000000000000000000000000000000000000000000000000000011100000000000000000000000000000111000000000000000000000011100000000011100000000000000001110000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #39:

score: 0
Accepted
time: 21ms
memory: 28676kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000111000000000000000000000000111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

NO

result:

ok answer is NO

Test #40:

score: 0
Accepted
time: 51ms
memory: 28572kb

input:

1500 1500
00000000000000011100000000000000000000000000000000000000011100000011100000000000000011100011100000000000000000000000000000000000000000000000000000111000000001111000000000000000000000000000001111000001110000000000000000001110000000000000000000000000000000000000001111011100011100000000000000...

output:

NO

result:

ok answer is NO

Test #41:

score: 0
Accepted
time: 84ms
memory: 28432kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #42:

score: 0
Accepted
time: 89ms
memory: 28668kb

input:

1500 1500
00011100000001111111000001111111000011110000000111000000000000011100000000111000000000000000001111000000000000000000000000000000011111000011110000000000000111100000000000001110000000011100001111000000001111000000000001111011110000000000000000000000000000011110000000000000000000000001110000...

output:

YES

result:

ok answer is YES

Test #43:

score: 0
Accepted
time: 63ms
memory: 28676kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000001110000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011100000000000000000000000000000001110000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

NO

result:

ok answer is NO

Test #44:

score: 0
Accepted
time: 70ms
memory: 28896kb

input:

1500 1500
00001110001110000011110000001111111000000000000111000001110000000000000000000000000000111000000000001110000000011111001111000000000000000000011110000000000111000000001111100000001111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011100000...

output:

NO

result:

ok answer is NO

Test #45:

score: 0
Accepted
time: 87ms
memory: 28688kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001110000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #46:

score: 0
Accepted
time: 83ms
memory: 28856kb

input:

1500 1500
00000000000000000000000000000000000001110000000000000000000000000000001110000000000000011100000000000000000111100000000000000000001111000000011100000000000000111100000000000000001110000000000000000000111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #47:

score: 0
Accepted
time: 28ms
memory: 28640kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000011100000000000000001110000000000001110000000000000000001110000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000011100...

output:

NO

result:

ok answer is NO

Test #48:

score: 0
Accepted
time: 11ms
memory: 28908kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #49:

score: 0
Accepted
time: 15ms
memory: 28684kb

input:

1500 1500
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

output:

YES

result:

ok answer is YES

Test #50:

score: 0
Accepted
time: 47ms
memory: 17636kb

input:

750 1500
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #51:

score: 0
Accepted
time: 58ms
memory: 28056kb

input:

1500 750
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

NO

result:

ok answer is NO

Test #52:

score: 0
Accepted
time: 70ms
memory: 19364kb

input:

750 1500
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #53:

score: 0
Accepted
time: 68ms
memory: 28008kb

input:

1500 750
111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #54:

score: 0
Accepted
time: 83ms
memory: 28144kb

input:

1500 1500
11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111...

output:

YES

result:

ok answer is YES

Test #55:

score: 0
Accepted
time: 82ms
memory: 28064kb

input:

1500 1500
01010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101...

output:

YES

result:

ok answer is YES

Test #56:

score: 0
Accepted
time: 179ms
memory: 28432kb

input:

1500 1500
11111111111110110001100000101100100110111111010111111011000111100111111111101111111110011111111111110101111111111111011111111111111111111100001100000001011001011001100001111100110000000000111111111111111111111111111111111111110111111111111111111111111000111111111111000110000011111111100011...

output:

YES

result:

ok answer is YES

Test #57:

score: 0
Accepted
time: 192ms
memory: 28064kb

input:

1500 1500
01101111111000011111111111111111111110011110011101111110000111111001111111111111111111111111111101111011101101111110001101111100001111111111111111111111000001100000110111111111110011001101111111111011100001011111100111101100001111111111111111100001111111111111011111000111111111111111101110...

output:

YES

result:

ok answer is YES