// author: erray
#include <bits/stdc++.h>
#ifdef DEBUG
#include "debug.h"
#else
#define debug(...) void(37)
#endif
using namespace std;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
int H, W;
cin >> H >> W;
vector<string> S(H);
for (int i = 0; i < H; ++i) {
cin >> S[i];
}
vector<vector<int>> I(H + 1, vector<int>(W + 1));
vector<vector<int>> O(H + 1, vector<int>(W + 1));
long long ans = 0;
for (int i = H - 1; i >= 0; --i) {
for (int j = W - 1; j >= 0; --j) {
I[i][j] = I[i + 1][j] + (S[i][j] == 'I');
O[i][j] = O[i][j + 1] + (S[i][j] == 'O');
if (S[i][j] == 'J') {
ans += 1LL * I[i][j] * O[i][j];
}
}
}
cout << ans << '\n';
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
500 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
344 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
500 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
344 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
2 ms |
2396 KB |
Output is correct |
15 |
Correct |
0 ms |
464 KB |
Output is correct |
16 |
Correct |
1 ms |
1628 KB |
Output is correct |
17 |
Correct |
0 ms |
452 KB |
Output is correct |
18 |
Correct |
2 ms |
2768 KB |
Output is correct |
19 |
Correct |
2 ms |
2652 KB |
Output is correct |
20 |
Correct |
2 ms |
2908 KB |
Output is correct |
21 |
Correct |
3 ms |
2908 KB |
Output is correct |
22 |
Correct |
2 ms |
2652 KB |
Output is correct |
23 |
Correct |
2 ms |
2808 KB |
Output is correct |
24 |
Correct |
3 ms |
2908 KB |
Output is correct |
25 |
Correct |
2 ms |
2648 KB |
Output is correct |
26 |
Correct |
2 ms |
2904 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
344 KB |
Output is correct |
5 |
Correct |
1 ms |
500 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
344 KB |
Output is correct |
9 |
Correct |
0 ms |
344 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
1 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
2 ms |
2396 KB |
Output is correct |
15 |
Correct |
0 ms |
464 KB |
Output is correct |
16 |
Correct |
1 ms |
1628 KB |
Output is correct |
17 |
Correct |
0 ms |
452 KB |
Output is correct |
18 |
Correct |
2 ms |
2768 KB |
Output is correct |
19 |
Correct |
2 ms |
2652 KB |
Output is correct |
20 |
Correct |
2 ms |
2908 KB |
Output is correct |
21 |
Correct |
3 ms |
2908 KB |
Output is correct |
22 |
Correct |
2 ms |
2652 KB |
Output is correct |
23 |
Correct |
2 ms |
2808 KB |
Output is correct |
24 |
Correct |
3 ms |
2908 KB |
Output is correct |
25 |
Correct |
2 ms |
2648 KB |
Output is correct |
26 |
Correct |
2 ms |
2904 KB |
Output is correct |
27 |
Correct |
74 ms |
84720 KB |
Output is correct |
28 |
Correct |
1 ms |
860 KB |
Output is correct |
29 |
Correct |
5 ms |
6744 KB |
Output is correct |
30 |
Correct |
1 ms |
604 KB |
Output is correct |
31 |
Correct |
61 ms |
62564 KB |
Output is correct |
32 |
Correct |
66 ms |
88916 KB |
Output is correct |
33 |
Correct |
67 ms |
89472 KB |
Output is correct |
34 |
Correct |
69 ms |
72208 KB |
Output is correct |
35 |
Correct |
68 ms |
89088 KB |
Output is correct |
36 |
Correct |
67 ms |
89428 KB |
Output is correct |
37 |
Correct |
87 ms |
89704 KB |
Output is correct |
38 |
Correct |
46 ms |
61936 KB |
Output is correct |
39 |
Correct |
45 ms |
62172 KB |
Output is correct |