제출 #508549

#제출 시각아이디문제언어결과실행 시간메모리
508549CSQ31Bitaro the Brave (JOI19_ho_t1)C++17
100 / 100
575 ms88328 KiB
#include <bits/stdc++.h> using namespace std; char g[3000][3000]; int a[3000][3000],b[3000][3000]; int main() { int h,w; cin>>h>>w; for(int i=0;i<h;i++){ for(int j=0;j<w;j++){ cin>>g[i][j]; a[i][j] = g[i][j] == 'O'; b[i][j] = g[i][j] == 'I'; if(j)a[i][j]+=a[i][j-1]; if(i)b[i][j]+=b[i-1][j]; } } long long int ans = 0; for(int i=0;i<h;i++){ for(int j=0;j<w;j++){ if(g[i][j] == 'J'){ ans+=(b[h-1][j] - b[i][j]) * 1LL * (a[i][w-1] - a[i][j]); } } } cout<<ans; }
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