#include <bits/stdc++.h>
using namespace std;
int n, m, dp[3002][3002][3], nr[3002][3];
char ch[] = "JOI";
char v[3002][3002];
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
cin >> n >> m;
for (int i = 1; i <= n; i++)
for (int j = 1; j <= m; j++)
cin >> v[i][j];
for (int i = n; i >= 1; i--)
for (int j = 1; j <= m; j++)
for (int k = 0; k < 3; k++)
dp[i][j][k] = dp[i + 1][j][k] + (v[i][j] == ch[k]);
long long ans = 0;
for (int i = 1; i <= n; i++) {
for (int j = m; j >= 1; j--) {
for (int k = 0; k < 3; k++)
nr[j][k] = nr[j + 1][k] + (v[i][j] == ch[k]);
if (v[i][j] == 'J')
ans += 1ll * dp[i + 1][j][2] * nr[j + 1][1];
//if (v[i][j] == 'O')
//ans += 1ll * dp[i + 1][j][0] * nr[j + 1][2] + 1ll * dp[i + 1][j][2] * nr[j + 1][0];
//if (v[i][j] == 'I')
//ans += 1ll * dp[i + 1][j][1] * nr[j + 1][0] + 1ll * dp[i + 1][j][0] * nr[j + 1][1];
}
}
cout << ans;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1132 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 14 |
Correct |
8 ms |
6124 KB |
Output is correct |
| 15 |
Correct |
2 ms |
3308 KB |
Output is correct |
| 16 |
Correct |
5 ms |
3692 KB |
Output is correct |
| 17 |
Correct |
1 ms |
492 KB |
Output is correct |
| 18 |
Correct |
10 ms |
6764 KB |
Output is correct |
| 19 |
Correct |
9 ms |
6636 KB |
Output is correct |
| 20 |
Correct |
9 ms |
6636 KB |
Output is correct |
| 21 |
Correct |
10 ms |
7020 KB |
Output is correct |
| 22 |
Correct |
10 ms |
6892 KB |
Output is correct |
| 23 |
Correct |
9 ms |
6892 KB |
Output is correct |
| 24 |
Correct |
11 ms |
7020 KB |
Output is correct |
| 25 |
Correct |
9 ms |
6892 KB |
Output is correct |
| 26 |
Correct |
9 ms |
6892 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
364 KB |
Output is correct |
| 2 |
Correct |
1 ms |
364 KB |
Output is correct |
| 3 |
Correct |
1 ms |
364 KB |
Output is correct |
| 4 |
Correct |
1 ms |
364 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1132 KB |
Output is correct |
| 14 |
Correct |
8 ms |
6124 KB |
Output is correct |
| 15 |
Correct |
2 ms |
3308 KB |
Output is correct |
| 16 |
Correct |
5 ms |
3692 KB |
Output is correct |
| 17 |
Correct |
1 ms |
492 KB |
Output is correct |
| 18 |
Correct |
10 ms |
6764 KB |
Output is correct |
| 19 |
Correct |
9 ms |
6636 KB |
Output is correct |
| 20 |
Correct |
9 ms |
6636 KB |
Output is correct |
| 21 |
Correct |
10 ms |
7020 KB |
Output is correct |
| 22 |
Correct |
10 ms |
6892 KB |
Output is correct |
| 23 |
Correct |
9 ms |
6892 KB |
Output is correct |
| 24 |
Correct |
11 ms |
7020 KB |
Output is correct |
| 25 |
Correct |
9 ms |
6892 KB |
Output is correct |
| 26 |
Correct |
9 ms |
6892 KB |
Output is correct |
| 27 |
Correct |
274 ms |
123244 KB |
Output is correct |
| 28 |
Correct |
10 ms |
16876 KB |
Output is correct |
| 29 |
Correct |
20 ms |
10476 KB |
Output is correct |
| 30 |
Correct |
1 ms |
748 KB |
Output is correct |
| 31 |
Correct |
203 ms |
97388 KB |
Output is correct |
| 32 |
Correct |
278 ms |
123756 KB |
Output is correct |
| 33 |
Correct |
252 ms |
123544 KB |
Output is correct |
| 34 |
Correct |
268 ms |
112876 KB |
Output is correct |
| 35 |
Correct |
265 ms |
123756 KB |
Output is correct |
| 36 |
Correct |
257 ms |
123580 KB |
Output is correct |
| 37 |
Correct |
300 ms |
123912 KB |
Output is correct |
| 38 |
Correct |
181 ms |
96748 KB |
Output is correct |
| 39 |
Correct |
181 ms |
97004 KB |
Output is correct |
