제출 #718307

#제출 시각아이디문제언어결과실행 시간메모리
718307Yell0Bitaro the Brave (JOI19_ho_t1)C++17
100 / 100
141 ms158888 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; const int MN=3002; int H,W; ll sfr[MN][MN],sfc[MN][MN]; char gr[MN][MN]; int main() { ios::sync_with_stdio(0);cin.tie(0); cin>>H>>W; for(int i=1;i<=H;++i) cin>>gr[i]+1; for(int i=1;i<=H;++i) for(int j=W;j>0;--j) sfr[i][j]=sfr[i][j+1]+(gr[i][j]=='O'); for(int i=H;i>0;--i) for(int j=1;j<=W;++j) sfc[i][j]=sfc[i+1][j]+(gr[i][j]=='I'); ll ans=0; for(int i=1;i<=H;++i) for(int j=1;j<=W;++j) if(gr[i][j]=='J') ans+=sfr[i][j]*sfc[i][j]; cout<<ans<<'\n'; return 0; }

컴파일 시 표준 에러 (stderr) 메시지

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:13:35: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   13 |   for(int i=1;i<=H;++i) cin>>gr[i]+1;
      |                              ~~~~~^~
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