#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define debug(x) cerr << #x << ": " << x << endl;
#define debug2(x, y) debug(x) debug(y);
#define repn(i, a, b) for(int i = (int)(a); i < (int)(b); i++)
#define rep(i, a) for(int i = 0; i < (int)(a); i++)
#define all(v) v.begin(), v.end()
#define mp make_pair
#define pb push_back
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define sq(x) ((x) * (x))
template<class T> T gcd(T a, T b){ return ((b == 0) ? a : gcd(b, a % b)); }
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
//freopen("input.in", "r", stdin);
//freopen("output.out", "w", stdout);
int h, w;
cin >> h >> w;
vector<string> s(h);
rep(i, h) cin >> s[i];
ll ans = 0;
vector<ll> cnt(h, 0), cnt1(w, 0);
for(int i = h - 1; i >= 0; i--){
for(int j = w - 1; j >= 0; j--){
if(s[i][j] == 'O') cnt[i]++;
if(s[i][j] == 'I') cnt1[j]++;
if(s[i][j] == 'J') ans += (ll)(cnt[i] * cnt1[j]);
}
}
cout << ans << endl;
return 0;
}
/*
Things to look out for:
- Integer overflows
- Array bounds
- Special cases
Be careful!
*/
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
384 KB |
Output is correct |
| 3 |
Correct |
5 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
5 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
384 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
4 ms |
256 KB |
Output is correct |
| 11 |
Correct |
4 ms |
384 KB |
Output is correct |
| 12 |
Correct |
4 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
384 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
384 KB |
Output is correct |
| 3 |
Correct |
5 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
5 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
384 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
4 ms |
256 KB |
Output is correct |
| 11 |
Correct |
4 ms |
384 KB |
Output is correct |
| 12 |
Correct |
4 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
384 KB |
Output is correct |
| 14 |
Correct |
7 ms |
768 KB |
Output is correct |
| 15 |
Correct |
5 ms |
384 KB |
Output is correct |
| 16 |
Correct |
5 ms |
640 KB |
Output is correct |
| 17 |
Correct |
5 ms |
512 KB |
Output is correct |
| 18 |
Correct |
7 ms |
896 KB |
Output is correct |
| 19 |
Correct |
6 ms |
820 KB |
Output is correct |
| 20 |
Correct |
6 ms |
896 KB |
Output is correct |
| 21 |
Correct |
7 ms |
896 KB |
Output is correct |
| 22 |
Correct |
6 ms |
896 KB |
Output is correct |
| 23 |
Correct |
6 ms |
1024 KB |
Output is correct |
| 24 |
Correct |
7 ms |
896 KB |
Output is correct |
| 25 |
Correct |
6 ms |
896 KB |
Output is correct |
| 26 |
Correct |
6 ms |
896 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
384 KB |
Output is correct |
| 2 |
Correct |
5 ms |
384 KB |
Output is correct |
| 3 |
Correct |
5 ms |
384 KB |
Output is correct |
| 4 |
Correct |
5 ms |
384 KB |
Output is correct |
| 5 |
Correct |
5 ms |
384 KB |
Output is correct |
| 6 |
Correct |
5 ms |
384 KB |
Output is correct |
| 7 |
Correct |
5 ms |
384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
384 KB |
Output is correct |
| 9 |
Correct |
5 ms |
384 KB |
Output is correct |
| 10 |
Correct |
4 ms |
256 KB |
Output is correct |
| 11 |
Correct |
4 ms |
384 KB |
Output is correct |
| 12 |
Correct |
4 ms |
384 KB |
Output is correct |
| 13 |
Correct |
5 ms |
384 KB |
Output is correct |
| 14 |
Correct |
7 ms |
768 KB |
Output is correct |
| 15 |
Correct |
5 ms |
384 KB |
Output is correct |
| 16 |
Correct |
5 ms |
640 KB |
Output is correct |
| 17 |
Correct |
5 ms |
512 KB |
Output is correct |
| 18 |
Correct |
7 ms |
896 KB |
Output is correct |
| 19 |
Correct |
6 ms |
820 KB |
Output is correct |
| 20 |
Correct |
6 ms |
896 KB |
Output is correct |
| 21 |
Correct |
7 ms |
896 KB |
Output is correct |
| 22 |
Correct |
6 ms |
896 KB |
Output is correct |
| 23 |
Correct |
6 ms |
1024 KB |
Output is correct |
| 24 |
Correct |
7 ms |
896 KB |
Output is correct |
| 25 |
Correct |
6 ms |
896 KB |
Output is correct |
| 26 |
Correct |
6 ms |
896 KB |
Output is correct |
| 27 |
Correct |
92 ms |
17912 KB |
Output is correct |
| 28 |
Correct |
5 ms |
512 KB |
Output is correct |
| 29 |
Correct |
8 ms |
1664 KB |
Output is correct |
| 30 |
Correct |
5 ms |
384 KB |
Output is correct |
| 31 |
Correct |
73 ms |
13184 KB |
Output is correct |
| 32 |
Correct |
63 ms |
18424 KB |
Output is correct |
| 33 |
Correct |
39 ms |
18432 KB |
Output is correct |
| 34 |
Correct |
80 ms |
15232 KB |
Output is correct |
| 35 |
Correct |
54 ms |
18432 KB |
Output is correct |
| 36 |
Correct |
38 ms |
18432 KB |
Output is correct |
| 37 |
Correct |
96 ms |
18432 KB |
Output is correct |
| 38 |
Correct |
40 ms |
13056 KB |
Output is correct |
| 39 |
Correct |
29 ms |
13184 KB |
Output is correct |
