/// I'm only brave when I have to be
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define fast_io ios::sync_with_stdio(false);cin.tie(NULL);
#define file_io freopen("input.txt","r",stdin);freopen("output.txt","w",stdout);
#define FOR(i,k,n) for(int i = k; i < n; ++ i)
#define debf cout<<"(0-0)\n";
#define all(x) x.begin(), x.end()
#define dec(x) cout << fixed << setprecision(x);
#define pf push_front
#define ppf pop_front
#define dash " ------- "
#define what(x) cerr << #x << " is " << x << endl;
#define eb emplace_back
//#define int short int
//#define int long long
#define sz(s) (int) (s.size())
#define fl cout.flush()
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;
typedef unsigned long long ull;
typedef long double ld;
template <class T> using max_heap = priority_queue <T, vector <T>, less <T> >;
template <class T> using min_heap = priority_queue <T, vector <T>, greater <T> >;
constexpr int MOD = 1e9 + 7, N = 3008, M = 1e5 + 8, SQ = 500, INF = 2e9 + 8, LGN = 11, mod = 998244353;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int n, m, cnt1[N][N];
ll ans;
string s[N];
int32_t main(){
fast_io;
cin >> n >> m;
FOR (i, 0, n){
cin >> s[i];
}
for (int i = 0; i < n; ++ i){
for (int j = m - 1; j >= 0; -- j){
cnt1[i][j] = cnt1[i][j+1] + (s[i][j] == 'O');
}
}
int x = 0;
for (int j = 0; j < m; ++ j){
for (int i = n - 1; i >= 0; -- i){
x += s[i][j] == 'I';
if (s[i][j] == 'J'){
ans += 1LL * cnt1[i][j] * x;
}
}
x = 0;
}
cout << ans;
return 0;
}
// Yesterday is history
// Tomorrow is a mystery
// but today is a gift
// That is why it is called the present
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
564 KB |
Output is correct |
| 3 |
Correct |
1 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
604 KB |
Output is correct |
| 5 |
Correct |
1 ms |
828 KB |
Output is correct |
| 6 |
Correct |
1 ms |
860 KB |
Output is correct |
| 7 |
Correct |
1 ms |
860 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1112 KB |
Output is correct |
| 9 |
Correct |
1 ms |
860 KB |
Output is correct |
| 10 |
Correct |
1 ms |
860 KB |
Output is correct |
| 11 |
Correct |
1 ms |
860 KB |
Output is correct |
| 12 |
Correct |
1 ms |
860 KB |
Output is correct |
| 13 |
Correct |
1 ms |
856 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
564 KB |
Output is correct |
| 3 |
Correct |
1 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
604 KB |
Output is correct |
| 5 |
Correct |
1 ms |
828 KB |
Output is correct |
| 6 |
Correct |
1 ms |
860 KB |
Output is correct |
| 7 |
Correct |
1 ms |
860 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1112 KB |
Output is correct |
| 9 |
Correct |
1 ms |
860 KB |
Output is correct |
| 10 |
Correct |
1 ms |
860 KB |
Output is correct |
| 11 |
Correct |
1 ms |
860 KB |
Output is correct |
| 12 |
Correct |
1 ms |
860 KB |
Output is correct |
| 13 |
Correct |
1 ms |
856 KB |
Output is correct |
| 14 |
Correct |
3 ms |
3676 KB |
Output is correct |
| 15 |
Correct |
1 ms |
2140 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 17 |
Correct |
0 ms |
604 KB |
Output is correct |
| 18 |
Correct |
4 ms |
4080 KB |
Output is correct |
| 19 |
Correct |
3 ms |
3932 KB |
Output is correct |
| 20 |
Correct |
3 ms |
3992 KB |
Output is correct |
| 21 |
Correct |
4 ms |
3980 KB |
Output is correct |
| 22 |
Correct |
3 ms |
4188 KB |
Output is correct |
| 23 |
Correct |
3 ms |
3932 KB |
Output is correct |
| 24 |
Correct |
4 ms |
3932 KB |
Output is correct |
| 25 |
Correct |
3 ms |
3932 KB |
Output is correct |
| 26 |
Correct |
3 ms |
3932 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
564 KB |
Output is correct |
| 3 |
Correct |
1 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
604 KB |
Output is correct |
| 5 |
Correct |
1 ms |
828 KB |
Output is correct |
| 6 |
Correct |
1 ms |
860 KB |
Output is correct |
| 7 |
Correct |
1 ms |
860 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1112 KB |
Output is correct |
| 9 |
Correct |
1 ms |
860 KB |
Output is correct |
| 10 |
Correct |
1 ms |
860 KB |
Output is correct |
| 11 |
Correct |
1 ms |
860 KB |
Output is correct |
| 12 |
Correct |
1 ms |
860 KB |
Output is correct |
| 13 |
Correct |
1 ms |
856 KB |
Output is correct |
| 14 |
Correct |
3 ms |
3676 KB |
Output is correct |
| 15 |
Correct |
1 ms |
2140 KB |
Output is correct |
| 16 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 17 |
Correct |
0 ms |
604 KB |
Output is correct |
| 18 |
Correct |
4 ms |
4080 KB |
Output is correct |
| 19 |
Correct |
3 ms |
3932 KB |
Output is correct |
| 20 |
Correct |
3 ms |
3992 KB |
Output is correct |
| 21 |
Correct |
4 ms |
3980 KB |
Output is correct |
| 22 |
Correct |
3 ms |
4188 KB |
Output is correct |
| 23 |
Correct |
3 ms |
3932 KB |
Output is correct |
| 24 |
Correct |
4 ms |
3932 KB |
Output is correct |
| 25 |
Correct |
3 ms |
3932 KB |
Output is correct |
| 26 |
Correct |
3 ms |
3932 KB |
Output is correct |
| 27 |
Correct |
110 ms |
53292 KB |
Output is correct |
| 28 |
Correct |
5 ms |
10332 KB |
Output is correct |
| 29 |
Correct |
6 ms |
4960 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| 31 |
Correct |
83 ms |
42684 KB |
Output is correct |
| 32 |
Correct |
86 ms |
54100 KB |
Output is correct |
| 33 |
Correct |
100 ms |
54132 KB |
Output is correct |
| 34 |
Correct |
108 ms |
49364 KB |
Output is correct |
| 35 |
Correct |
110 ms |
54192 KB |
Output is correct |
| 36 |
Correct |
108 ms |
54352 KB |
Output is correct |
| 37 |
Correct |
130 ms |
54292 KB |
Output is correct |
| 38 |
Correct |
57 ms |
42640 KB |
Output is correct |
| 39 |
Correct |
60 ms |
42324 KB |
Output is correct |
