Submission #843697

#	Time	Username	Problem	Language	Result	Execution time	Memory
843697		AlphaMale06	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	132 ms	18156 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;
#define int long long
const int N = 3003;
char a[N][N];
signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    for(int i=0; i< n; i++){
        for(int j=0; j< m; j++){
            cin >> a[i][j];
        }
    }
    int rows[n]={0};
    int cols[m]={0};
    int ans=0;
    for(int i=n-1; i>=0; i--){
        for(int j=m-1; j>=0; j--){
            if(a[i][j]=='O'){
                rows[i]++;
            }
            else if(a[i][j]=='I'){
                cols[j]++;
            }
            else ans+=rows[i]*cols[j];
        }
    }
    cout << ans << '\n';
}

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