Submission #99711

#	Time	Username	Problem	Language	Result	Execution time	Memory
99711		MrTEK	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	262 ms	9720 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

typedef long long int ll;
typedef pair<int,int> ii;

const int N = 3e3 + 5;

int n,m,orb[N],ing[N];
char a[N][N];

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL); cout.tie(NULL);
  cin >> n >> m;
  for (int i = 1 ; i <= n ; i++)
    for (int j = 1 ; j <= m ; j++) {
      cin >> a[i][j];
      if (a[i][j] == 'O')
        orb[i]++;
      if (a[i][j] == 'I')
        ing[j]++;
    }
  ll ans = 0;
  for (int i = 1 ; i <= n ; i++)
    for (int j = 1 ; j <= m ; j++) {
      if (a[i][j] == 'O')
        orb[i]--;
      if (a[i][j] == 'I')
        ing[j]--;
      if (a[i][j] == 'J')
        ans += orb[i] * ing[j];
    }
  cout << ans << endl;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50