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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#611298#833. Cells Blockingswt2009AC ✓367ms272156kbC++143.1kb2024-10-04 20:15:172024-10-04 20:15:17

Judging History

你现在查看的是最新测评结果

  • [2024-10-04 20:15:17]
  • 评测
  • 测评结果:AC
  • 用时:367ms
  • 内存:272156kb
  • [2024-10-04 20:15:17]
  • 提交

answer

//#pragma GCC optimize(3,"Ofast","inline")
#include <bits/stdc++.h>
using namespace std;  

#define int long long
#define pii pair<int,int>
#define mkp make_pair
#define fi first
#define se second
#define pb push_back
#define lowbit(x) ((x)&(-x))

#define lc(p) ((p)<<1)
#define rc(p) ((p)<<1|1)

#define sqr(x) ((x)*(x))

// #define mod 1000000007
// #define mod 998244353
#define eps 1e-10

#define debug cout<<__LINE__<<" "<<__FUNCTION__<<"\n";
#define spa putchar(' ')
#define ero putchar('\n')

mt19937 rnd(time(0));

constexpr int N=1e6+10,inf=1e18;

inline int read(){
	int x=0,f=1;char ch=getchar();
	while (ch<'0'||ch>'9'){if (ch=='-') f=-1;ch=getchar();}
	while (ch>='0'&&ch<='9'){x=x*10+ch-48;ch=getchar();}
	return x*f;
}
inline void write(int x){
	if(!x)putchar('0');
	if(x<0)x=-x,putchar('-');
	int cnt=0,a[30];
	while(x)a[++cnt]=x%10,x/=10;
	while(cnt--)putchar(a[cnt+1]+'0');
}

int f[3030][3030];
int g[3030][3030];
char s[3030][3030];

vector<int>tmp[N];

int calc(int x){
    return x*(x-1)/2;
}

signed main(){
	// freopen(".in","r",stdin);
	// freopen(".out","w",stdout);
	// ios::sync_with_stdio(0),cin.tie(0),cout.tie(0); 
    int n=read(),m=read();
    for(int i=1;i<=n;i++){
        scanf("%s",s[i]+1);
    }
    int cnt=0;
	for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            cnt+=(s[i][j]=='.');
        }
    }
	if(s[n][m]=='*'||s[1][1]=='*'){
        write(calc(cnt));
		return 0;
	}
    // f->zheng g->fan
	f[1][1]=1;
    g[n][m]=1;
	for(int i=1;i<=n;i++){
        for(int j=1;j<=m;j++){
            if(s[i][j]=='.'){
                f[i][j]|=f[i][j-1]|f[i-1][j];
            }
        }
    }
	for(int i=n;i;i--){
        for(int j=m;j;j--){
            if(s[i][j]=='.'){
                g[i][j]|=g[i+1][j]|g[i][j+1];
            }
        }
    }
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			g[i][j]&=f[i][j];
			if(g[i][j]){
                tmp[i+j].push_back(i);
            }
		}
	}
    if(!g[n][m]||!g[1][1]){
		write(calc(cnt));
		return 0;
	}
    int ans=0;
	for(int i=2;i<=n+m;i++){
		if(tmp[i].size()==1){
			ans+=--cnt;
			continue ;
		}
		int res1=tmp[i][1];
        int res2=i-res1;
        int res3=tmp[i][tmp[i].size()-1];
        int res4=i-res3;
		if(res1==res3){
            ans++;
        }
		for(int j=i+1;j<=n+m;j++){
			if(res3<n&&g[res3+1][res4]){
                res3++;
            }
			else{
                res4++;
            }
			if(res2<m&&g[res1][res2+1]){
                res2++;
            }
			else{
                res1++;
            }
			if(res3==res1&&tmp[j].size()>1){
                ans++;
            }
		}
		res1=tmp[i][0];
        res2=i-res1;
        res3=tmp[i][tmp[i].size()-2];
        res4=i-res3;
		for(int j=i+1;j<=n+m;j++){
			if(res3<n&&g[res3+1][res4]){
                res3++;
            }
			else{
                res4++;
            }
			if(res2<m&&g[res1][res2+1]){
                res2++;
            }
			else{
                res1++;
            }
			if(res3==res1&&tmp[j].size()>1){
                ans++;
            }
		}
	}
    write(ans);
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 3ms
memory: 31728kb

input:

3 3
...
...
...

output:

17

result:

ok 1 number(s): "17"

Test #2:

score: 0
Accepted
time: 0ms
memory: 27364kb

input:

3 3
.**
.*.
...

output:

15

result:

ok 1 number(s): "15"

Test #3:

score: 0
Accepted
time: 3ms
memory: 29124kb

input:

3 4
****
....
****

output:

6

result:

ok 1 number(s): "6"

Test #4:

score: 0
Accepted
time: 0ms
memory: 27352kb

input:

5 5
*....
.*.*.
*****
*.***
..*..

output:

66

result:

ok 1 number(s): "66"

Test #5:

score: 0
Accepted
time: 7ms
memory: 27284kb

input:

10 10
...***.*..
**...*.***
...***.*..
.**...*.*.
.*****..*.
..*.****.*
.**...****
..*..*.*.*
*.*.**....
....**...*

output:

1378

result:

ok 1 number(s): "1378"

Test #6:

score: 0
Accepted
time: 163ms
memory: 270240kb

input:

3000 3000
.....................................................................................................................................................................................................................................................................................................

output:

17999999

result:

ok 1 number(s): "17999999"

Test #7:

score: 0
Accepted
time: 213ms
memory: 271356kb

input:

3000 3000
...................................................................................................................*......................................................................................................................................................................*..........

output:

17981671

result:

ok 1 number(s): "17981671"

Test #8:

score: 0
Accepted
time: 226ms
memory: 270808kb

input:

3000 3000
.....................................................................................................................................................................................................................................................................................................

output:

17963615

result:

ok 1 number(s): "17963615"

Test #9:

score: 0
Accepted
time: 269ms
memory: 270680kb

input:

3000 3000
.........................................................................................................*...........................................................................................................................................................................................

output:

17945165

result:

ok 1 number(s): "17945165"

Test #10:

score: 0
Accepted
time: 315ms
memory: 270464kb

input:

3000 3000
......................................................................................................................................*........................................................................................................................................*.....................

output:

17928211

result:

ok 1 number(s): "17928211"

Test #11:

score: 0
Accepted
time: 287ms
memory: 270084kb

input:

3000 3000
...........................................*.........................................................................................................................................................................................................................................................

output:

17911522

result:

ok 1 number(s): "17911522"

Test #12:

score: 0
Accepted
time: 286ms
memory: 270156kb

input:

3000 3000
..............................*................................................................................................................*.....................................................................................................................................................

output:

17892283

result:

ok 1 number(s): "17892283"

Test #13:

score: 0
Accepted
time: 293ms
memory: 269724kb

input:

3000 3000
................................................................*....*................................................................................................................................................................................*..............................................

output:

17873837

result:

ok 1 number(s): "17873837"

Test #14:

score: 0
Accepted
time: 303ms
memory: 269208kb

input:

3000 3000
............................................................................................*.............................................................................*.....................................................................................................*....................

output:

17856701

result:

ok 1 number(s): "17856701"

Test #15:

score: 0
Accepted
time: 311ms
memory: 269220kb

input:

3000 3000
......................................*..........................................................................................................................................................*...................................................................................................

output:

17837857

result:

ok 1 number(s): "17837857"

Test #16:

score: 0
Accepted
time: 300ms
memory: 268248kb

input:

3000 3000
.................................................................................................................................................................................................................................*...................................................................

output:

17819731

result:

ok 1 number(s): "17819731"

Test #17:

score: 0
Accepted
time: 320ms
memory: 240612kb

input:

3000 3000
......**.....*.......*.*..........*..*...............**.............*.......*......*........*...*.....*.*.................*......*....*.........*....................*.................*.......................*.......*..*.*.......*.......................*..........*..*......................*...

output:

16202000

result:

ok 1 number(s): "16202000"

Test #18:

score: 0
Accepted
time: 367ms
memory: 210052kb

input:

3000 3000
..................*....*....*...*.*.............*.............*....*.*..*...*...*...*....*.................*...*.*.***...*....*......*.......**...*.......*.*...**...*...*...**.........*..........*.....*.*....*..*.......*.........*..*.....*...............**.......*.....*.*..*.*.*........*.....

output:

21600132

result:

ok 1 number(s): "21600132"

Test #19:

score: 0
Accepted
time: 108ms
memory: 178812kb

input:

3000 3000
..*.**...*...............*........*.*..*.*.....*........*.*..........***..*..*..*..*.*....*...*.*.....***.*...*........*..*.****..*.*....**.......*......*....*..*......*......*..*..*.*..*....*..**.*.......**.*...*....**.....**..*......*...*....*..*.**.*..***...*.....*....***.*........*.......

output:

19862779430431

result:

ok 1 number(s): "19862779430431"

Test #20:

score: 0
Accepted
time: 91ms
memory: 179004kb

input:

3000 3000
.**.**..***....*.*....*..*...*.**.**.**.......*...*........*.**.*...*...**..*...*.*.**.*.*.*.*..*...*.....*.*.**.*.*....*.**.....*..**.**.*....**.**.**..*..**...*...***.**.*.*......**.**.*...****.....***.*..*.**.*......*..**.**.**.....**...*.*..***.******...**....****..***..**.*........*.....

output:

14601805246666

result:

ok 1 number(s): "14601805246666"

Test #21:

score: 0
Accepted
time: 0ms
memory: 27744kb

input:

1 1
*

output:

0

result:

ok 1 number(s): "0"

Test #22:

score: 0
Accepted
time: 3ms
memory: 32148kb

input:

1 1
.

output:

0

result:

ok 1 number(s): "0"

Test #23:

score: 0
Accepted
time: 0ms
memory: 33164kb

input:

2 2
..
..

output:

6

result:

ok 1 number(s): "6"

Test #24:

score: 0
Accepted
time: 28ms
memory: 37916kb

input:

3000 3000
.***..**..*.*.*..*...**.*.**...***.....*..***.***.***.*..***.*......*.**.***.***.*...**.*.*..***.*..*.**..***.....*.*...***.*.***.*...*.*.....***.*..**...*.*..*.******.*.*...**.*..**.**.**.*.**..***.**.***..*......**.***.**.*....*..*.....*...*..*.*..*..*.*...**.**...*..**..***.**..*....*.....

output:

10151159625145

result:

ok 1 number(s): "10151159625145"

Test #25:

score: 0
Accepted
time: 28ms
memory: 37436kb

input:

3000 3000
*******************************************************************************************************************************************************************************************************************************************************.******************************************...

output:

39716328

result:

ok 1 number(s): "39716328"

Test #26:

score: 0
Accepted
time: 179ms
memory: 272080kb

input:

3000 3000
..*..................................................................................................................................................................................................................................................................................................

output:

35988321

result:

ok 1 number(s): "35988321"

Test #27:

score: 0
Accepted
time: 188ms
memory: 271700kb

input:

3000 3000
.....................................................................................................................................................................................................................................................................................................

output:

35981866

result:

ok 1 number(s): "35981866"

Test #28:

score: 0
Accepted
time: 206ms
memory: 271660kb

input:

3000 3000
...**................................................................................................................................................................................................................................................................................................

output:

17988153

result:

ok 1 number(s): "17988153"

Test #29:

score: 0
Accepted
time: 220ms
memory: 272052kb

input:

3000 3000
...*.*...............................................................................................................................................................................................................................................................................................

output:

35969654

result:

ok 1 number(s): "35969654"

Test #30:

score: 0
Accepted
time: 192ms
memory: 272156kb

input:

3000 3000
..*..................................................................................................................................................................................................................................................................................................

output:

17982216

result:

ok 1 number(s): "17982216"

Test #31:

score: 0
Accepted
time: 184ms
memory: 270536kb

input:

3000 3000
....**.*.............................................................................................................................................................................................................................................................................................

output:

71916090

result:

ok 1 number(s): "71916090"

Test #32:

score: 0
Accepted
time: 160ms
memory: 270732kb

input:

3000 3000
....****.............................................................................................................................................................................................................................................................................................

output:

71903186

result:

ok 1 number(s): "71903186"

Test #33:

score: 0
Accepted
time: 176ms
memory: 271476kb

input:

3000 3000
.........*...........................................................................................................................................................................................................................................................................................

output:

17973051

result:

ok 1 number(s): "17973051"

Test #34:

score: 0
Accepted
time: 191ms
memory: 269560kb

input:

3000 3000
.*.......*.............................................................................................................*................................................................................*............................................................................................

output:

35630636

result:

ok 1 number(s): "35630636"

Test #35:

score: 0
Accepted
time: 166ms
memory: 269664kb

input:

3000 3000
.**...........................*..........................................................................................................................................*...........................................................................................................................

output:

44529907

result:

ok 1 number(s): "44529907"

Test #36:

score: 0
Accepted
time: 178ms
memory: 269572kb

input:

3000 3000
....*................................................................................................................................................................................................................................................................................................

output:

53426863

result:

ok 1 number(s): "53426863"

Test #37:

score: 0
Accepted
time: 212ms
memory: 269600kb

input:

3000 3000
..*.*........................................................................*............................*...............*.............................................................................................................................................*........*...................

output:

53419301

result:

ok 1 number(s): "53419301"

Test #38:

score: 0
Accepted
time: 216ms
memory: 269108kb

input:

3000 3000
......*.........*...................................................................................*.....................................................................................................................*................................................*.........................

output:

26705269

result:

ok 1 number(s): "26705269"

Test #39:

score: 0
Accepted
time: 184ms
memory: 269420kb

input:

3000 3000
....*.**....*................*............................*..........*...............................................................................................................................................................................................................................

output:

17799069

result:

ok 1 number(s): "17799069"

Test #40:

score: 0
Accepted
time: 179ms
memory: 269676kb

input:

3000 3000
...***.......................................*...........*.....................*........*...........................................................................................................................................................*................................................

output:

53393629

result:

ok 1 number(s): "53393629"

Test #41:

score: 0
Accepted
time: 196ms
memory: 271880kb

input:

3000 3000
.....................................................................................................................................................................................................................................................................................................

output:

98852811

result:

ok 1 number(s): "98852811"

Test #42:

score: 0
Accepted
time: 3ms
memory: 32316kb

input:

1 3000
........................................................................................................................................................................................................................................................................................................

output:

4498500

result:

ok 1 number(s): "4498500"

Test #43:

score: 0
Accepted
time: 200ms
memory: 269480kb

input:

3000 3000
.*.....*...........................................................................................................*...................................*........................................................................................*............*.......................................

output:

88979547

result:

ok 1 number(s): "88979547"

Test #44:

score: 0
Accepted
time: 183ms
memory: 271732kb

input:

3000 3000
.....................................................................................................................................................................................................................................................................................................

output:

35964327

result:

ok 1 number(s): "35964327"