제출 #541534

#제출 시각아이디문제언어결과실행 시간메모리
541534happypotatoBitaro the Brave (JOI19_ho_t1)C++17
100 / 100
262 ms89384 KiB
#include <bits/stdc++.h> using namespace std; #define ll long long void init() { } void solve() { int h, w; cin >> h >> w; string a[h]; for (int i = 0; i < h; i++) cin >> a[i]; int psi[h][w], pso[h][w]; for (int i = 0; i < w; i++) { psi[h - 1][i] = 0; for (int j = h - 2; j >= 0; j--) { psi[j][i] = psi[j + 1][i] + (a[j + 1][i] == 'I'); } } for (int i = 0; i < h; i++) { pso[i][w - 1] = 0; for (int j = w - 2; j >= 0; j--) { pso[i][j] = pso[i][j + 1] + (a[i][j + 1] == 'O'); } } ll int ans = 0; for (int i = 0; i < h; i++) { for (int j = 0; j < w; j++) { if (a[i][j] == 'J') { ans += psi[i][j] * pso[i][j]; } } } cout << ans << endl; } int main() { ios::sync_with_stdio(false); cin.tie(0); init(); solve(); }
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