Submission #1073396

#	Time	Username	Problem	Language	Result	Execution time	Memory
1073396		RKHTM	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	126 ms	18004 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;
#define yasuho ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define endl "\n"
typedef long long ll;
const ll MOD = 1e9+7;

void solve(){
    ll r, c; cin >> r >> c;
    vector<vector<char>> grid(r+1, vector<char>(c+1));
    for(int i=1; i<=r; i++){
        for(int j=1; j<=c; j++){
            cin >> grid[i][j];
        }
    }

    vector<ll> ingot(c+1, 0);
    ll ans = 0;
    for(int i=r; i>=1; i--){
        ll orb=0;
        for(int j=c; j>=1; j--){
            if(grid[i][j]=='J'){
                // cout << ingot[j] << ' ' << orb << endl;
                ans += ingot[j]*orb;
            }
            if(grid[i][j]=='I') ingot[j]++;
            if(grid[i][j]=='O') orb++;
        }
    }

    cout << ans << endl;

    return;
}

int main(){
    yasuho // remove for interactive problem
    ll t;
    t = 1;
    //cin >> t;
    while(t--) solve();
}

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