Submission #450342

#	Time	Username	Problem	Language	Result	Execution time	Memory
450342		JovanB	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	170 ms	44424 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef long double ld;
 
int mat[3005][3005];
int ingots[3005];
int orbs[3005];
 
int main(){
    ios_base::sync_with_stdio(false);
    cout.precision(10);
    cout<<fixed;
 
    int n, m;
    cin >> n >> m;
    for(int i=1; i<=n; i++){
        string s;
        cin >> s;
        for(int j=1; j<=m; j++){
            if(s[j-1] == 'J') mat[i][j] = 1;
            else if(s[j-1] == 'O') mat[i][j] = 2;
            else mat[i][j] = 3;
        }
    }
    ll res = 0;
    for(int i=n; i>=1; i--){
        for(int j=m; j>=1; j--){
            if(mat[i][j] == 2) orbs[i]++;
            else if(mat[i][j] == 3) ingots[j]++;
            else res += ingots[j] * orbs[i];
        }
    }
    cout << res;
    return 0;
}

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