Submission #157762

#	Time	Username	Problem	Language	Result	Execution time	Memory
157762		InfiniteJest	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	378 ms	106460 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];
ll prefb[5000][5000];
ll fb[5000];
ll f[5000];

int main(){
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cin>>h>>w;
  ll sumf;
  ll tot=0;
  for(int i=0;i<h;i++){
    ll sum=0;
    for(int y=0;y<w;y++){
      cin>>tab[i][y];
      if(i!=0&&tab[i-1][y]=='J')fb[y]+=sumf-prefb[i-1][y];
      if(tab[i][y]=='O')sum++;
      else if(tab[i][y]=='I'){
        f[y]++;
      }
      else{
        tot+=f[y]*fb[y];
        f[y]=0;
      }
      if(tab[i][y]!='J'&&i==h-1){
        tot+=f[y]*fb[y];
      }
      prefb[i][y]=sum;
    }
    sumf=sum;
  }
  
  printf("%lld",tot);

}

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