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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#571088#7900. Gifts from KnowledgesmlWA 26ms66992kbC++141.8kb2024-09-17 20:27:532024-09-17 20:27:53

Judging History

你现在查看的是最新测评结果

  • [2024-09-17 20:27:53]
  • 评测
  • 测评结果:WA
  • 用时:26ms
  • 内存:66992kb
  • [2024-09-17 20:27:53]
  • 提交

answer

#include<bits/stdc++.h>
#define int long long
using namespace std;
const int mod=1e9 + 7,N=2e6+10;
string mp[N];
int p[N];
int qsumi(int a,int b){
	int res=1;
	while(b){
		if(b&1) res=res*a%mod;
		b>>=1;
		a=a*a%mod;
	}
	return res;
}
int find(int x) {
	if (p[x]==x) {
		return x;
	}
	return p[x]=find(p[x]);
}
void unionn(int x,int y) {
	x=find(x);
	y=find(y);
	if (x==y) {
		return;
	}
	p[x]=y;
}
void solve()
{
	int n,m;
	cin>>n>>m;
	//vector<int>p(2*n+10); 
	for(int i=1;i<=2*n+1;i++) p[i]=i;
//	vector<vector<char>>mp(n+10,vector<char>(m+10));
	for(int i=1;i<=n;i++){
		cin>>mp[i];
		mp[i]=" "+mp[i];
	}
	vector<int>cnt(m+1,0);
    vector<int>v[2*m];
	for (int i=1; i<=n; i++) {
		for (int j=1; j<=m; j++) {
			if (mp[i][j]=='1') {
				cnt[j]++;
				v[j].push_back(i);
			}
		}
	}
	if (m&1) {
		if (v[(m+1)/2].size()>=2) {
			cout<<"0\n";
			return;
		}
	}
//	if(m%2){
//		int id=(m+1)/2;
//		if(cnt[id]>1){
//			cout<<0<<'\n';
//			return;
//		}
//	}
	for(int i=1;i<=m/2;i++){
		int ot=m-i+1;
		int sum=cnt[i]+cnt[ot];
		if(sum>2){
			cout<<0<<'\n';
			return;
		}
		if(sum<2) continue;
		int r1,r2;
		if(cnt[i]==cnt[ot]) r1=v[i][0],r2=v[ot][0];
		else{
			int cur=i;
			if(cnt[cur]<cnt[ot]) swap(cur,ot);
			r1=v[cur][0],r2=v[cur][1];
		}
		if(r1==r2){
			continue;
		}
		int r11=r1+n,r22=r2+n;
		unionn(r1,r22),unionn(r2,r11); 
	}
	int ans=0;
	for (int i=1; i<=n; i++) {
		if (find(i)==find(i+n)) {
//			cout<<i<<"****"<<"\n";
			cout<<"0\n";
			return;
		}

	}
	for (int i=1; i<=2*n; i++) {
		find(i);
		if (p[i]==i) {
			ans+=1;
		}
	}
	cout<<qsumi(2,ans/2)%mod<<'\n';
}
signed main()
{
	ios::sync_with_stdio(false);
	cin.tie(0),cout.tie(0);
	int t;
	cin>>t;
	while(t--) solve();
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 3ms
memory: 66932kb

input:

3
3 5
01100
10001
00010
2 1
1
1
2 3
001
001

output:

4
0
2

result:

ok 3 number(s): "4 0 2"

Test #2:

score: 0
Accepted
time: 21ms
memory: 66852kb

input:

15613
10 10
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
15 8
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
1 5
00000
5 9
000000000
000000000
0000...

output:

1024
32768
2
32
32768
128
32
16
16
2
16384
16384
128
128
32768
8192
128
64
16384
2
4
2
4096
16
4096
1024
32768
32768
16384
8
128
2
16
4096
8192
32768
8192
8192
16
16384
16384
256
128
8
256
8
4096
512
2
4
32
32
2
64
512
1024
32768
32768
2
64
16384
16
8192
16
256
16
64
8192
8192
64
1024
2
32768
2
4
51...

result:

ok 15613 numbers

Test #3:

score: -100
Wrong Answer
time: 26ms
memory: 66992kb

input:

15759
9 6
000000
000000
000000
000000
000000
000000
000000
000000
000000
5 15
010000000000000
000000000000000
000000000000000
000100000000000
000100000000000
14 12
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000...

output:

512
16
16384
512
1024
4096
32768
4
2
512
512
512
512
8
2
256
16
4096
512
64
16
4096
512
32
32768
8192
32
2048
128
16
4096
64
32768
256
32
16384
8
512
32
2048
8
16
1024
2048
128
64
32
8
512
8
8192
256
8192
32768
2
8
512
512
256
32
2
2048
8192
8
64
8
2
16384
32768
32768
1024
4096
16384
16384
128
256
4...

result:

wrong answer 2380th numbers differ - expected: '0', found: '4'