제출 #166119

#제출 시각아이디문제언어결과실행 시간메모리
166119SaboonBitaro the Brave (JOI19_ho_t1)C++14
100 / 100
235 ms49940 KiB
#include<bits/stdc++.h> using namespace std; typedef long long ll; const int maxn = 3000 + 5; string s[maxn]; int a[maxn][maxn]; int main(){ ios_base::sync_with_stdio(false); int n, m; cin >> n >> m; for (int i = 0; i < n; i++){ cin >> s[i]; int cnt = 0; for (int j = m - 1; j >= 0; j--){ cnt += (s[i][j] == 'O'); a[i][j] = cnt; } } ll answer = 0; for (int j = 0; j < m; j++){ int cnt = 0; for (int i = n - 1; i >= 0; i--){ cnt += (s[i][j] == 'I'); if (s[i][j] == 'J') answer += 1ll * a[i][j] * cnt; } } cout << answer << endl; }
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