#include <bits/stdc++.h>
using namespace std;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int h, w;
cin >> h >> w;
vector<string> t(h);
for (auto& s : t) {
cin >> s;
}
vector<vector<int>> pref_vert(h, vector<int>(w));
long long ans = 0;
for (int i = h - 1; i >= 0; --i) {
vector<int> pref_hor(w);
pref_hor[w - 1] = t[i].back() == 'O';
for (int j = w - 2; j >= 0; --j) {
if (t[i][j] == 'J') {
ans += (long long)pref_hor[j + 1] * (i + 1 < h ? pref_vert[i + 1][j] : 0);
}
pref_hor[j] = pref_hor[j + 1] + (t[i][j] == 'O');
pref_vert[i][j] = t[i][j] == 'I';
if (i + 1 < h) {
pref_vert[i][j] += pref_vert[i + 1][j];
}
}
}
cout << ans << '\n';
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
328 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
0 ms |
328 KB |
Output is correct |
| 8 |
Correct |
1 ms |
328 KB |
Output is correct |
| 9 |
Correct |
0 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
0 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
328 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
0 ms |
328 KB |
Output is correct |
| 8 |
Correct |
1 ms |
328 KB |
Output is correct |
| 9 |
Correct |
0 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
0 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1088 KB |
Output is correct |
| 17 |
Correct |
1 ms |
320 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1748 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1732 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1744 KB |
Output is correct |
| 21 |
Correct |
3 ms |
1748 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1760 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1708 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1748 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1704 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1748 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
340 KB |
Output is correct |
| 5 |
Correct |
1 ms |
328 KB |
Output is correct |
| 6 |
Correct |
0 ms |
340 KB |
Output is correct |
| 7 |
Correct |
0 ms |
328 KB |
Output is correct |
| 8 |
Correct |
1 ms |
328 KB |
Output is correct |
| 9 |
Correct |
0 ms |
340 KB |
Output is correct |
| 10 |
Correct |
1 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
324 KB |
Output is correct |
| 12 |
Correct |
0 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1492 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1088 KB |
Output is correct |
| 17 |
Correct |
1 ms |
320 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1748 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1732 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1744 KB |
Output is correct |
| 21 |
Correct |
3 ms |
1748 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1760 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1708 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1748 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1704 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 27 |
Correct |
73 ms |
51232 KB |
Output is correct |
| 28 |
Correct |
1 ms |
596 KB |
Output is correct |
| 29 |
Correct |
6 ms |
4180 KB |
Output is correct |
| 30 |
Correct |
1 ms |
340 KB |
Output is correct |
| 31 |
Correct |
53 ms |
37728 KB |
Output is correct |
| 32 |
Correct |
55 ms |
53844 KB |
Output is correct |
| 33 |
Correct |
57 ms |
53992 KB |
Output is correct |
| 34 |
Correct |
63 ms |
43600 KB |
Output is correct |
| 35 |
Correct |
61 ms |
53892 KB |
Output is correct |
| 36 |
Correct |
55 ms |
54036 KB |
Output is correct |
| 37 |
Correct |
82 ms |
54288 KB |
Output is correct |
| 38 |
Correct |
41 ms |
37412 KB |
Output is correct |
| 39 |
Correct |
38 ms |
37504 KB |
Output is correct |
