Submission #531241

#	Time	Username	Problem	Language	Result	Execution time	Memory
531241		someone	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	182 ms	17988 KiB

joi2019_ho_t1

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

struct Art {
    int sz, val;
};

const int N = 3e3 + 42, INF = 1e18 + 42, MOD = 1e9 + 7;

char c[N][N];
int lig, col, val[N][2];

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    cin >> lig >> col;
    for(int i = 0; i < lig; i++)
        for(int j = 0; j < col; j++)
            cin >> c[i][j];
    int ans = 0;
    for(int i = lig-1; i > -1; i--)
        for(int j = col-1; j > -1; j--)
            if(c[i][j] == 'O')
                val[i][0]++;
            else if(c[i][j] == 'I')
                val[j][1]++;
            else
                ans += val[j][1] * val[i][0];
    cout << ans;
}

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