#include <bits/stdc++.h>
#define int int64_t
#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
using namespace std;
using ar = array<int, 2>;
const int64_t INF = 1ll << 60;
const int N = 3000 + 50;
string s[N];
int n, m, cntI[N][N], cntO[N][N];
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m;
FOR(i, 0, n) cin >> s[i];
int ans = 0;
for (int i = n - 1; i >= 0; --i) {
for (int j = m - 1; j >= 0; --j) {
cntI[i][j] = cntI[i][j + 1] + (s[i][j] == 'O');
cntO[i][j] = cntO[i + 1][j] + (s[i][j] == 'I');
ans += (s[i][j] == 'J' ? cntI[i][j] * cntO[i][j] : 0);
}
}
cout << ans << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
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 |
1 ms |
604 KB |
Output is correct |
| 5 |
Correct |
1 ms |
3164 KB |
Output is correct |
| 6 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 8 |
Correct |
1 ms |
3164 KB |
Output is correct |
| 9 |
Correct |
1 ms |
3128 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 11 |
Correct |
1 ms |
3160 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1372 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
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 |
1 ms |
604 KB |
Output is correct |
| 5 |
Correct |
1 ms |
3164 KB |
Output is correct |
| 6 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 8 |
Correct |
1 ms |
3164 KB |
Output is correct |
| 9 |
Correct |
1 ms |
3128 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 11 |
Correct |
1 ms |
3160 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 14 |
Correct |
5 ms |
15020 KB |
Output is correct |
| 15 |
Correct |
2 ms |
10588 KB |
Output is correct |
| 16 |
Correct |
2 ms |
7516 KB |
Output is correct |
| 17 |
Correct |
0 ms |
564 KB |
Output is correct |
| 18 |
Correct |
5 ms |
15708 KB |
Output is correct |
| 19 |
Correct |
5 ms |
15704 KB |
Output is correct |
| 20 |
Correct |
5 ms |
15452 KB |
Output is correct |
| 21 |
Correct |
5 ms |
15708 KB |
Output is correct |
| 22 |
Correct |
4 ms |
15708 KB |
Output is correct |
| 23 |
Correct |
4 ms |
15452 KB |
Output is correct |
| 24 |
Correct |
5 ms |
15672 KB |
Output is correct |
| 25 |
Correct |
4 ms |
15708 KB |
Output is correct |
| 26 |
Correct |
4 ms |
15536 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
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 |
1 ms |
604 KB |
Output is correct |
| 5 |
Correct |
1 ms |
3164 KB |
Output is correct |
| 6 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 8 |
Correct |
1 ms |
3164 KB |
Output is correct |
| 9 |
Correct |
1 ms |
3128 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 11 |
Correct |
1 ms |
3160 KB |
Output is correct |
| 12 |
Correct |
1 ms |
2908 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1372 KB |
Output is correct |
| 14 |
Correct |
5 ms |
15020 KB |
Output is correct |
| 15 |
Correct |
2 ms |
10588 KB |
Output is correct |
| 16 |
Correct |
2 ms |
7516 KB |
Output is correct |
| 17 |
Correct |
0 ms |
564 KB |
Output is correct |
| 18 |
Correct |
5 ms |
15708 KB |
Output is correct |
| 19 |
Correct |
5 ms |
15704 KB |
Output is correct |
| 20 |
Correct |
5 ms |
15452 KB |
Output is correct |
| 21 |
Correct |
5 ms |
15708 KB |
Output is correct |
| 22 |
Correct |
4 ms |
15708 KB |
Output is correct |
| 23 |
Correct |
4 ms |
15452 KB |
Output is correct |
| 24 |
Correct |
5 ms |
15672 KB |
Output is correct |
| 25 |
Correct |
4 ms |
15708 KB |
Output is correct |
| 26 |
Correct |
4 ms |
15536 KB |
Output is correct |
| 27 |
Correct |
115 ms |
161856 KB |
Output is correct |
| 28 |
Correct |
11 ms |
63836 KB |
Output is correct |
| 29 |
Correct |
6 ms |
14940 KB |
Output is correct |
| 30 |
Correct |
1 ms |
860 KB |
Output is correct |
| 31 |
Correct |
56 ms |
133168 KB |
Output is correct |
| 32 |
Correct |
61 ms |
162816 KB |
Output is correct |
| 33 |
Correct |
59 ms |
162568 KB |
Output is correct |
| 34 |
Correct |
64 ms |
154452 KB |
Output is correct |
| 35 |
Correct |
63 ms |
162788 KB |
Output is correct |
| 36 |
Correct |
68 ms |
162460 KB |
Output is correct |
| 37 |
Correct |
83 ms |
163040 KB |
Output is correct |
| 38 |
Correct |
46 ms |
132996 KB |
Output is correct |
| 39 |
Correct |
45 ms |
132688 KB |
Output is correct |
