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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
#328322#833. Cells BlockingwcyQwQAC ✓287ms59380kbC++143.5kb2024-02-15 19:12:152024-02-15 19:12:15

Judging History

你现在查看的是最新测评结果

  • [2024-02-15 19:12:15]
  • 评测
  • 测评结果:AC
  • 用时:287ms
  • 内存:59380kb
  • [2024-02-15 19:12:15]
  • 提交

answer

#include <bits/stdc++.h>
#define L(i, j, k) for (int i = (j); i <= (k); i++)
#define R(i, j, k) for (int i = (j); i >= (k); i--)

using namespace std;
using LL = long long;

const int N = 3510;
char a[N][N];
bool fr[N][N], to[N][N], vD[N][N], vR[N][N], c[N][N];

template<class T = int> T read() {
    T x = 0, y = 1;
    char c = getchar();
    while (c < '0' || c > '9') {
        if (c == '-') {
            y = -1;
        }
        c = getchar();
    }
    while (c >= '0' && c <= '9') {
        x = x * 10 + c - '0';
        c = getchar();
    }
    return x * y;
}

int main() {
    int n = read(), m = read(), cnt = 0;
    if (n == 1 && m == 1) {
        puts("0");
        return 0;
    }
    L(i, 1, n) {
        scanf("%s", a[i] + 1);
    }
    L(i, 1, n) {
        L(j, 1, m) {
            cnt += a[i][j] == '.';
        }
    }
    L(i, 1, n) {
        L(j, 1, m) {
            fr[i][j] |= fr[i - 1][j] || fr[i][j - 1] || (i == 1 && j == 1);
            fr[i][j] &= a[i][j] == '.';
        }
    }
    if (!fr[n][m]) {
        printf("%lld\n", (LL)cnt * (cnt - 1) / 2);
        return 0;
    }
    R(i, n, 1) {
        R(j, m, 1) {
            to[i][j] |= to[i + 1][j] || to[i][j + 1] || (i == n && j == m);
            to[i][j] &= a[i][j] == '.';
        }
    }
    int x = 1, y = 1;
    vD[1][1] = true;
    while (true) {
        if (to[x + 1][y]) {
            vD[x + 1][y] = true;
            x++;
        }
        else {
            vD[x][y + 1] = true;
            y++;
        }
        if (x == n && y == m) {
            break;
        }
    }
    x = 1, y = 1;
    vR[1][1] = true;
    while (true) {
        if (to[x][y + 1]) {
            vR[x][y + 1] = true;
            y++;
        }
        else {
            vR[x + 1][y] = true;
            x++;
        }
        if (x == n && y == m) {
            break;
        }
    }
    int cur = 0;
    LL res = 0;
    L(i, 1, n) {
        L(j, 1, m) {
            if (vD[i][j] && vR[i][j]) {
               res += cnt - (++cur); 
            }
        }
    }
    // L(i, 1, n) L(j, 1, m) clog << vD[i][j] << " \n"[j == m];
    // L(i, 1, n) L(j, 1, m) clog << vR[i][j] << " \n"[j == m];
    L(i, 1, n) {
        L(j, 1, m) {
            if (vD[i][j] && !vR[i][j]) {
                int k = 1;
                while (!to[i - k][j + k]) {
                    k++;
                }
                int x = i - k, y = j + k;
                while (true) {
                    if (fr[x][y - 1]) {
                        res += vR[x][y - 1] && !vD[x][y - 1];
                        y--;
                    }
                    else {
                        res += vR[x - 1][y] && !vD[x - 1][y];
                        x--;
                    }
                    if (x == 1 && y == 1) {
                        break;
                    }
                }
                x = i - k, y = j + k;
                while (true) {
                    if (to[x + 1][y]) {
                        res += vR[x + 1][y] && !vD[x + 1][y];
                        x++;
                    }
                    else {
                        res += vR[x][y + 1] && !vD[x][y + 1];
                        y++;
                    }
                    if (x == n && y == m) {
                        break;
                    }
                }
                res += vR[i - k][j + k] && !vD[i - k][j + k];
            }
        }
    }
    printf("%lld\n", res);
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 10024kb

input:

3 3
...
...
...

output:

17

result:

ok 1 number(s): "17"

Test #2:

score: 0
Accepted
time: 0ms
memory: 10044kb

input:

3 3
.**
.*.
...

output:

15

result:

ok 1 number(s): "15"

Test #3:

score: 0
Accepted
time: 1ms
memory: 5848kb

input:

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

output:

6

result:

ok 1 number(s): "6"

Test #4:

score: 0
Accepted
time: 1ms
memory: 5916kb

input:

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

output:

66

result:

ok 1 number(s): "66"

Test #5:

score: 0
Accepted
time: 0ms
memory: 5868kb

input:

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

output:

1378

result:

ok 1 number(s): "1378"

Test #6:

score: 0
Accepted
time: 257ms
memory: 58828kb

input:

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

output:

17999999

result:

ok 1 number(s): "17999999"

Test #7:

score: 0
Accepted
time: 263ms
memory: 57444kb

input:

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

output:

17981671

result:

ok 1 number(s): "17981671"

Test #8:

score: 0
Accepted
time: 274ms
memory: 59056kb

input:

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

output:

17963615

result:

ok 1 number(s): "17963615"

Test #9:

score: 0
Accepted
time: 264ms
memory: 59308kb

input:

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

output:

17945165

result:

ok 1 number(s): "17945165"

Test #10:

score: 0
Accepted
time: 265ms
memory: 58960kb

input:

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

output:

17928211

result:

ok 1 number(s): "17928211"

Test #11:

score: 0
Accepted
time: 260ms
memory: 57592kb

input:

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

output:

17911522

result:

ok 1 number(s): "17911522"

Test #12:

score: 0
Accepted
time: 255ms
memory: 58500kb

input:

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

output:

17892283

result:

ok 1 number(s): "17892283"

Test #13:

score: 0
Accepted
time: 267ms
memory: 58472kb

input:

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

output:

17873837

result:

ok 1 number(s): "17873837"

Test #14:

score: 0
Accepted
time: 274ms
memory: 58972kb

input:

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

output:

17856701

result:

ok 1 number(s): "17856701"

Test #15:

score: 0
Accepted
time: 277ms
memory: 57764kb

input:

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

output:

17837857

result:

ok 1 number(s): "17837857"

Test #16:

score: 0
Accepted
time: 256ms
memory: 59224kb

input:

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

output:

17819731

result:

ok 1 number(s): "17819731"

Test #17:

score: 0
Accepted
time: 263ms
memory: 57776kb

input:

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

output:

16202000

result:

ok 1 number(s): "16202000"

Test #18:

score: 0
Accepted
time: 287ms
memory: 59308kb

input:

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

output:

21600132

result:

ok 1 number(s): "21600132"

Test #19:

score: 0
Accepted
time: 44ms
memory: 26360kb

input:

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

output:

19862779430431

result:

ok 1 number(s): "19862779430431"

Test #20:

score: 0
Accepted
time: 40ms
memory: 24448kb

input:

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

output:

14601805246666

result:

ok 1 number(s): "14601805246666"

Test #21:

score: 0
Accepted
time: 1ms
memory: 3600kb

input:

1 1
*

output:

0

result:

ok 1 number(s): "0"

Test #22:

score: 0
Accepted
time: 0ms
memory: 3688kb

input:

1 1
.

output:

0

result:

ok 1 number(s): "0"

Test #23:

score: 0
Accepted
time: 2ms
memory: 10024kb

input:

2 2
..
..

output:

6

result:

ok 1 number(s): "6"

Test #24:

score: 0
Accepted
time: 28ms
memory: 26452kb

input:

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

output:

10151159625145

result:

ok 1 number(s): "10151159625145"

Test #25:

score: 0
Accepted
time: 33ms
memory: 26440kb

input:

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

output:

39716328

result:

ok 1 number(s): "39716328"

Test #26:

score: 0
Accepted
time: 263ms
memory: 59300kb

input:

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

output:

35988321

result:

ok 1 number(s): "35988321"

Test #27:

score: 0
Accepted
time: 268ms
memory: 59228kb

input:

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

output:

35981866

result:

ok 1 number(s): "35981866"

Test #28:

score: 0
Accepted
time: 259ms
memory: 58700kb

input:

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

output:

17988153

result:

ok 1 number(s): "17988153"

Test #29:

score: 0
Accepted
time: 267ms
memory: 59304kb

input:

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

output:

35969654

result:

ok 1 number(s): "35969654"

Test #30:

score: 0
Accepted
time: 268ms
memory: 57340kb

input:

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

output:

17982216

result:

ok 1 number(s): "17982216"

Test #31:

score: 0
Accepted
time: 258ms
memory: 59192kb

input:

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

output:

71916090

result:

ok 1 number(s): "71916090"

Test #32:

score: 0
Accepted
time: 260ms
memory: 59372kb

input:

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

output:

71903186

result:

ok 1 number(s): "71903186"

Test #33:

score: 0
Accepted
time: 264ms
memory: 57404kb

input:

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

output:

17973051

result:

ok 1 number(s): "17973051"

Test #34:

score: 0
Accepted
time: 271ms
memory: 59232kb

input:

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

output:

35630636

result:

ok 1 number(s): "35630636"

Test #35:

score: 0
Accepted
time: 259ms
memory: 59312kb

input:

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

output:

44529907

result:

ok 1 number(s): "44529907"

Test #36:

score: 0
Accepted
time: 267ms
memory: 59380kb

input:

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

output:

53426863

result:

ok 1 number(s): "53426863"

Test #37:

score: 0
Accepted
time: 271ms
memory: 59316kb

input:

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

output:

53419301

result:

ok 1 number(s): "53419301"

Test #38:

score: 0
Accepted
time: 271ms
memory: 57756kb

input:

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

output:

26705269

result:

ok 1 number(s): "26705269"

Test #39:

score: 0
Accepted
time: 264ms
memory: 57372kb

input:

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

output:

17799069

result:

ok 1 number(s): "17799069"

Test #40:

score: 0
Accepted
time: 267ms
memory: 59172kb

input:

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

output:

53393629

result:

ok 1 number(s): "53393629"

Test #41:

score: 0
Accepted
time: 262ms
memory: 58532kb

input:

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

output:

98852811

result:

ok 1 number(s): "98852811"

Test #42:

score: 0
Accepted
time: 2ms
memory: 10020kb

input:

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

output:

4498500

result:

ok 1 number(s): "4498500"

Test #43:

score: 0
Accepted
time: 268ms
memory: 59376kb

input:

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

output:

88979547

result:

ok 1 number(s): "88979547"

Test #44:

score: 0
Accepted
time: 270ms
memory: 59172kb

input:

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

output:

35964327

result:

ok 1 number(s): "35964327"