Submission #157657

#	Time	Username	Problem	Language	Result	Execution time	Memory
157657		InfiniteJest	Bitaro the Brave (JOI19_ho_t1)	C++14	50 / 100	1045 ms	83716 KiB

joi2019_ho_t1

#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <algorithm>
#include <math.h>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;

ifstream in("input.txt");
ofstream out("output.txt");

typedef long long ll;

int h,w;
char tab[5000][5000];
int pref[5000][5000];
int prefb[5000][5000];

int main(){
  cin>>h>>w;
  for(int i=0;i<h;i++){
    int sum=0;
    for(int y=0;y<w;y++){
      cin>>tab[i][y];
      if(tab[i][y]=='O')sum++;
      prefb[i][y]=sum;
    }
  }
  for(int i=0;i<w;i++){
    int sum=0;
    for(int y=0;y<h;y++){
      if(tab[y][i]=='I')sum++;
      pref[y][i]=sum;
    }
  }
  ll tot=0;
  for(int i=0;i<h;i++){
    for(int y=0;y<w;y++){
      if(tab[i][y]=='J'){
        tot+=(prefb[i][w-1]-prefb[i][y])*(pref[h-1][y]-pref[i][y]);
      }
    }
  }
  cout<<tot;

}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 50