Submission #252007

#	Time	Username	Problem	Language	Result	Execution time	Memory
252007		zecookiez	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	151 ms	19064 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
using namespace std;

const int MAXN = 3003;
long long orb[MAXN], ingot[MAXN];
string grid[MAXN];

int main() {

    cin.sync_with_stdio(0); cin.tie(0); cout.tie(0);

    //freopen("input.txt", "r", stdin);

    int n, m; cin >> n >> m;

    for(int i = 0; i < n; ++i){
        cin >> grid[i];
        for(int j = 0; j < m; ++j){
            if(grid[i][j] == 'I') ++ingot[j];
            else if(grid[i][j] == 'O') ++orb[i];
        }
    }

    long long tot = 0;
    for(int i = 0; i < n; ++i){
        for(int j = 0; j < m; ++j){
            if(grid[i][j] == 'J')
                tot += orb[i] * ingot[j];
            else if(grid[i][j] == 'O')
                --orb[i];
            else if(grid[i][j] == 'I')
                --ingot[j];
        }
    }
    cout << tot << "\n";

    return 0;
}

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