Submission #928411

#	Time	Username	Problem	Language	Result	Execution time	Memory
928411		Art_ogo	Bitaro the Brave (JOI19_ho_t1)	C++17	0 / 100	1 ms	444 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

#define ll long long
#define fi first
#define se second
#define ve vector
#define all(x) x.begin(), x.end()

using namespace std;

typedef pair<ll, ll> pll;
typedef pair<int, int> pii;

#pragma GCC optimize("O3")

signed main(){
    int n, m;
    cin >> n >> m;
    ve<string> v(n);
    for(auto& i : v)
        cin >> i;
    /* for(auto i : v) */
    /*     cout << i << endl; */
    ve<ve<int> > os(n, ve<int>(m, 0)), is(n, ve<int>(m, 0));
    for(int i = 0; i < n; i++){
        os[i][m - 1] = v[i][m - 1] == 'O';
        for(int j = m - 2; j >= 0; j--)
            os[i][j] = os[i][j + 1] + int(v[i][j] == 'O');
    }
    for(int j = 0; j < m; j++){
        is[n - 1][j] = v[n - 1][j] == 'I';
        for(int i = n - 2; i >= 0; i--)
            is[i][j] = is[i + 1][j] + int(v[i][j] == 'I');
    }
    ll res = 0;
    for(int i = 0; i < n; i++)
        for(int j = 0; j < n; j++)
            if(v[i][j] == 'J')
                res += os[i][j]*is[i][j];
    cout << res;
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50