#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#define endl "\n"
typedef long long ll;
template<class T, class T2> inline ostream &operator <<(ostream &out, const pair<T, T2> &x) { out << x.first << " " << x.second; return out;}
template<class T, class T2> inline istream &operator >>(istream &in, pair<T, T2> &x) { in >> x.first >> x.second; return in;}
template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const ll mod = 1e9 + 7;
#define out(x) "{" << (#x) << ": " << x << "} "
const ll MAX_N = 3e3 + 10;
ll cnto[MAX_N][MAX_N], cnti[MAX_N][MAX_N];
string in[MAX_N];
ll n, m;
signed main() {
ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
cin >> n >> m;
for(ll i = 0; i < n; i ++) {
cin >> in[i];
}
ll ans = 0;
for(ll i = n - 1; i >= 0; i --) {
for(ll j = m - 1; j >= 0; j --) {
cnto[i][j] = cnto[i][j + 1];
cnti[i][j] = cnti[i + 1][j];
if(in[i][j] == 'O') {
cnto[i][j] ++;
} else if(in[i][j] == 'I') {
cnti[i][j] ++;
} else {
ans += cnto[i][j] * cnti[i][j];
}
}
}
cout << ans << endl;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
512 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
512 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1280 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1280 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1280 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
512 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
512 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1280 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1280 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1280 KB |
Output is correct |
| 14 |
Correct |
7 ms |
7808 KB |
Output is correct |
| 15 |
Correct |
3 ms |
3968 KB |
Output is correct |
| 16 |
Correct |
4 ms |
4860 KB |
Output is correct |
| 17 |
Correct |
1 ms |
512 KB |
Output is correct |
| 18 |
Correct |
8 ms |
8832 KB |
Output is correct |
| 19 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 20 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 21 |
Correct |
8 ms |
8832 KB |
Output is correct |
| 22 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 23 |
Correct |
7 ms |
8704 KB |
Output is correct |
| 24 |
Correct |
9 ms |
8832 KB |
Output is correct |
| 25 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 26 |
Correct |
6 ms |
8704 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
512 KB |
Output is correct |
| 2 |
Correct |
1 ms |
384 KB |
Output is correct |
| 3 |
Correct |
1 ms |
384 KB |
Output is correct |
| 4 |
Correct |
1 ms |
512 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1280 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1280 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1408 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1280 KB |
Output is correct |
| 14 |
Correct |
7 ms |
7808 KB |
Output is correct |
| 15 |
Correct |
3 ms |
3968 KB |
Output is correct |
| 16 |
Correct |
4 ms |
4860 KB |
Output is correct |
| 17 |
Correct |
1 ms |
512 KB |
Output is correct |
| 18 |
Correct |
8 ms |
8832 KB |
Output is correct |
| 19 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 20 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 21 |
Correct |
8 ms |
8832 KB |
Output is correct |
| 22 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 23 |
Correct |
7 ms |
8704 KB |
Output is correct |
| 24 |
Correct |
9 ms |
8832 KB |
Output is correct |
| 25 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 26 |
Correct |
6 ms |
8704 KB |
Output is correct |
| 27 |
Correct |
170 ms |
159328 KB |
Output is correct |
| 28 |
Correct |
13 ms |
19584 KB |
Output is correct |
| 29 |
Correct |
10 ms |
13952 KB |
Output is correct |
| 30 |
Correct |
1 ms |
896 KB |
Output is correct |
| 31 |
Correct |
129 ms |
130936 KB |
Output is correct |
| 32 |
Correct |
123 ms |
160248 KB |
Output is correct |
| 33 |
Correct |
123 ms |
159736 KB |
Output is correct |
| 34 |
Correct |
150 ms |
151928 KB |
Output is correct |
| 35 |
Correct |
123 ms |
160120 KB |
Output is correct |
| 36 |
Correct |
121 ms |
159736 KB |
Output is correct |
| 37 |
Correct |
166 ms |
160376 KB |
Output is correct |
| 38 |
Correct |
97 ms |
130168 KB |
Output is correct |
| 39 |
Correct |
95 ms |
130424 KB |
Output is correct |
