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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
#328374#833. Cells BlockingthomaswmyAC ✓139ms118580kbC++142.2kb2024-02-15 19:45:402024-02-15 19:45:41

Judging History

你现在查看的是最新测评结果

  • [2024-02-15 19:45:41]
  • 评测
  • 测评结果:AC
  • 用时:139ms
  • 内存:118580kb
  • [2024-02-15 19:45:40]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N=3010;

int n,m;
char S[N][N];
bool f[N][N],g[N][N];
bool p1[N][N],p2[N][N];
int cl[N][N],cr[N][N];
int ld[N<<1];
int cnt,tot;
ll ans;

int main() {
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;i++) {
		scanf("%s",S[i]+1);
		for(int j=1;j<=m;j++) cnt+=S[i][j]=='.';
	}
	if(cnt<=1) {
		printf("0");
		return 0;
	}
	f[1][1]=1;
	for(int i=1;i<=n;i++) {
		for(int j=1;j<=m;j++) {
			if(S[i][j]!='.') f[i][j]=0;
			if(j<m) f[i][j+1]|=f[i][j];
			if(i<n) f[i+1][j]|=f[i][j];
		}
	}
	g[n][m]=1;
	for(int i=n;i>=1;i--) {
		for(int j=m;j>=1;j--) {
			if(S[i][j]!='.') g[i][j]=0;
			if(j>1) g[i][j-1]|=g[i][j];
			if(i>1) g[i-1][j]|=g[i][j];
		}
	}
	if(!f[n][m]) {
		printf("%lld",1ll*cnt*(cnt-1)/2);
		return 0;
	}
	int x=1,y=1;
	while(x!=n || y!=m) {
		p1[x][y]=1;
		if(x==n) y++;
		else if(y==m) x++;
		else if(f[x+1][y] && g[x+1][y]) x++;
		else y++; 
	}
	p1[x][y]=1;
	x=1,y=1;
	while(x!=n || y!=m) {
		p2[x][y]=1;
		if(x==n) y++;
		else if(y==m) x++;
		else if(f[x][y+1] && g[x][y+1]) y++;
		else x++; 
	}
	p2[x][y]=1;
	for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) tot+=p1[i][j]&p2[i][j];
	ans=1ll*tot*(cnt-tot)+1ll*tot*(tot-1)/2;
	for(int i=n;i>=1;i--) {
		for(int j=m;j>=1;j--) {
			if(!f[i][j] || !g[i][j]) continue;
			cr[i][j]=p1[i][j];
			if(i==n && j==m) continue;
			else if(i==n) cr[i][j]+=cr[i][j+1];
			else if(j==m) cr[i][j]+=cr[i+1][j];
			else if(f[i][j+1] && g[i][j+1]) cr[i][j]+=cr[i][j+1];
			else cr[i][j]+=cr[i+1][j];
		}
	}
	for(int i=1;i<=n;i++) {
		for(int j=1;j<=m;j++) {
			if(!f[i][j] || !g[i][j]) continue;
			cl[i][j]=p1[i][j];
			if(i==1 && j==1) continue;
			else if(i==1) cl[i][j]+=cl[i][j-1];
			else if(j==1) cl[i][j]+=cl[i-1][j];
			else if(f[i-1][j] && g[i-1][j]) cl[i][j]+=cl[i-1][j];
			else cl[i][j]+=cl[i][j-1];
		}
	}
	for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) if(f[i][j] && g[i][j]) if(!ld[i+j] && !p2[i][j]) ld[i+j]=i;
	for(int i=1;i<=n;i++) {
		for(int j=1;j<=m;j++) {
			if(p1[i][j]) continue;
			if(p2[i][j]) {
				int x=ld[i+j],y=i+j-x;
				ans+=cl[x][y]+cr[x][y]-p1[x][y]-tot;
			}
		}
	}
	printf("%lld",ans);
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 4032kb

input:

3 3
...
...
...

output:

17

result:

ok 1 number(s): "17"

Test #2:

score: 0
Accepted
time: 1ms
memory: 3776kb

input:

3 3
.**
.*.
...

output:

15

result:

ok 1 number(s): "15"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3840kb

input:

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

output:

6

result:

ok 1 number(s): "6"

Test #4:

score: 0
Accepted
time: 1ms
memory: 3904kb

input:

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

output:

66

result:

ok 1 number(s): "66"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3984kb

input:

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

output:

1378

result:

ok 1 number(s): "1378"

Test #6:

score: 0
Accepted
time: 112ms
memory: 118572kb

input:

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

output:

17999999

result:

ok 1 number(s): "17999999"

Test #7:

score: 0
Accepted
time: 101ms
memory: 118512kb

input:

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

output:

17981671

result:

ok 1 number(s): "17981671"

Test #8:

score: 0
Accepted
time: 97ms
memory: 118528kb

input:

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

output:

17963615

result:

ok 1 number(s): "17963615"

Test #9:

score: 0
Accepted
time: 97ms
memory: 118480kb

input:

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

output:

17945165

result:

ok 1 number(s): "17945165"

Test #10:

score: 0
Accepted
time: 100ms
memory: 118464kb

input:

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

output:

17928211

result:

ok 1 number(s): "17928211"

Test #11:

score: 0
Accepted
time: 98ms
memory: 118232kb

input:

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

output:

17911522

result:

ok 1 number(s): "17911522"

Test #12:

score: 0
Accepted
time: 108ms
memory: 118280kb

input:

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

output:

17892283

result:

ok 1 number(s): "17892283"

Test #13:

score: 0
Accepted
time: 92ms
memory: 118328kb

input:

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

output:

17873837

result:

ok 1 number(s): "17873837"

Test #14:

score: 0
Accepted
time: 104ms
memory: 118184kb

input:

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

output:

17856701

result:

ok 1 number(s): "17856701"

Test #15:

score: 0
Accepted
time: 84ms
memory: 118284kb

input:

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

output:

17837857

result:

ok 1 number(s): "17837857"

Test #16:

score: 0
Accepted
time: 88ms
memory: 118312kb

input:

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

output:

17819731

result:

ok 1 number(s): "17819731"

Test #17:

score: 0
Accepted
time: 122ms
memory: 114756kb

input:

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

output:

16202000

result:

ok 1 number(s): "16202000"

Test #18:

score: 0
Accepted
time: 139ms
memory: 106280kb

input:

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

output:

21600132

result:

ok 1 number(s): "21600132"

Test #19:

score: 0
Accepted
time: 71ms
memory: 30332kb

input:

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

output:

19862779430431

result:

ok 1 number(s): "19862779430431"

Test #20:

score: 0
Accepted
time: 93ms
memory: 30172kb

input:

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

output:

14601805246666

result:

ok 1 number(s): "14601805246666"

Test #21:

score: 0
Accepted
time: 0ms
memory: 3832kb

input:

1 1
*

output:

0

result:

ok 1 number(s): "0"

Test #22:

score: 0
Accepted
time: 0ms
memory: 3804kb

input:

1 1
.

output:

0

result:

ok 1 number(s): "0"

Test #23:

score: 0
Accepted
time: 0ms
memory: 3744kb

input:

2 2
..
..

output:

6

result:

ok 1 number(s): "6"

Test #24:

score: 0
Accepted
time: 101ms
memory: 30336kb

input:

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

output:

10151159625145

result:

ok 1 number(s): "10151159625145"

Test #25:

score: 0
Accepted
time: 24ms
memory: 30208kb

input:

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

output:

39716328

result:

ok 1 number(s): "39716328"

Test #26:

score: 0
Accepted
time: 104ms
memory: 118540kb

input:

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

output:

35988321

result:

ok 1 number(s): "35988321"

Test #27:

score: 0
Accepted
time: 104ms
memory: 118384kb

input:

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

output:

35981866

result:

ok 1 number(s): "35981866"

Test #28:

score: 0
Accepted
time: 108ms
memory: 118520kb

input:

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

output:

17988153

result:

ok 1 number(s): "17988153"

Test #29:

score: 0
Accepted
time: 99ms
memory: 118440kb

input:

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

output:

35969654

result:

ok 1 number(s): "35969654"

Test #30:

score: 0
Accepted
time: 97ms
memory: 118488kb

input:

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

output:

17982216

result:

ok 1 number(s): "17982216"

Test #31:

score: 0
Accepted
time: 115ms
memory: 118380kb

input:

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

output:

71916090

result:

ok 1 number(s): "71916090"

Test #32:

score: 0
Accepted
time: 102ms
memory: 118340kb

input:

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

output:

71903186

result:

ok 1 number(s): "71903186"

Test #33:

score: 0
Accepted
time: 102ms
memory: 118532kb

input:

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

output:

17973051

result:

ok 1 number(s): "17973051"

Test #34:

score: 0
Accepted
time: 99ms
memory: 118204kb

input:

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

output:

35630636

result:

ok 1 number(s): "35630636"

Test #35:

score: 0
Accepted
time: 103ms
memory: 118148kb

input:

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

output:

44529907

result:

ok 1 number(s): "44529907"

Test #36:

score: 0
Accepted
time: 99ms
memory: 118496kb

input:

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

output:

53426863

result:

ok 1 number(s): "53426863"

Test #37:

score: 0
Accepted
time: 107ms
memory: 118364kb

input:

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

output:

53419301

result:

ok 1 number(s): "53419301"

Test #38:

score: 0
Accepted
time: 110ms
memory: 118368kb

input:

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

output:

26705269

result:

ok 1 number(s): "26705269"

Test #39:

score: 0
Accepted
time: 94ms
memory: 118312kb

input:

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

output:

17799069

result:

ok 1 number(s): "17799069"

Test #40:

score: 0
Accepted
time: 88ms
memory: 118128kb

input:

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

output:

53393629

result:

ok 1 number(s): "53393629"

Test #41:

score: 0
Accepted
time: 103ms
memory: 118580kb

input:

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

output:

98852811

result:

ok 1 number(s): "98852811"

Test #42:

score: 0
Accepted
time: 1ms
memory: 3940kb

input:

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

output:

4498500

result:

ok 1 number(s): "4498500"

Test #43:

score: 0
Accepted
time: 92ms
memory: 118436kb

input:

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

output:

88979547

result:

ok 1 number(s): "88979547"

Test #44:

score: 0
Accepted
time: 122ms
memory: 118484kb

input:

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

output:

35964327

result:

ok 1 number(s): "35964327"