Submission #1118070

#	Time	Username	Problem	Language	Result	Execution time	Memory
1118070		vjudge1	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	225 ms	17992 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
#define sts(v) stable_sort(v.BE, v.E)
#define Rsts(v) stable_sort(v.rBE, v.rE)
#define rev(v) reverse(v.BE, v.E)
#define BE begin()
#define rBE rbegin()
#define E end()
#define rE rend()
#define pb push_back
#define ppb pop_back()
#define pf push_front
#define ppf pop_front()
#define F first
#define S second

using namespace std;
using ll = long long;

int main(){
    ios_base::sync_with_stdio(0); 
    cin.tie(0); cout.tie(0);

    int n, m; cin >> n >> m;
    vector<int> cnt_O(n + 1), cnt_I(m + 1);
    char v[n + 1][m + 1];

    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            char c; cin >> c;

            v[i][j] = c;
            if(c == 'O')cnt_O[i]++;
            if(c == 'I')cnt_I[j]++;
        }
    }
    ll ans = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= m; j++){
            char c = v[i][j];
            if(c == 'J')ans += cnt_O[i] * cnt_I[j];
            else if(c == 'O')cnt_O[i]--;
            else cnt_I[j]--;
        }
    }

    cout << ans << '\n';

    return 0;
}

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