Submission #328665

#TimeUsernameProblemLanguageResultExecution timeMemory
328665a_playerBitaro the Brave (JOI19_ho_t1)C++14
0 / 100
1 ms492 KiB
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

const int nax=3e3+3;
char m[nax][nax];
vector<int> row[nax];
vector<int> col[nax];
int main(){
  int h,w;
  cin>>h>>w;
  for(int i=0;i<h;i++)
  for(int j=0;j<w;j++){
    cin>>m[i][j];
    if(m[i][j]=='O')row[i].push_back(j);
    if(m[i][j]=='I')col[j].push_back(i);
  }
  ll sol=0;
  for(int i=0;i<h;i++)
  for(int j=0;j<w;j++){
    if(m[i][j]=='J'){
      int p=lower_bound(row[j].begin(),row[j].end(),i)-row[j].begin();
      int q=lower_bound(col[i].begin(),col[i].end(),j)-col[i].begin();
      sol+=(ll)(row[j].size()-p)*(ll)(col[i].size()-q);
    }
  }
  cout<<sol<<endl;

}
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