Submission #157701

#	Time	Username	Problem	Language	Result	Execution time	Memory
157701		InfiniteJest	Bitaro the Brave (JOI19_ho_t1)	C++14	50 / 100	1040 ms	111468 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 sump[5000];
int fb[5000];
int f[5000];
vector<pair<int,int> > v;

int main(){
  cin>>h>>w;
  int sumf;
  ll tot=0;
  for(int i=0;i<h;i++){
    int 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'){
        sump[y]++;
        f[y]++;
      }
      else{
        tot+=f[y]*fb[y];
        f[y]=0;
      }
      prefb[i][y]=sum;
      pref[i][y]=sump[y];
    }
    sumf=sum;
  }
  //cout<<pref[0][3];
  for(int i=0;i<w;i++)if(tab[h-1][i]!='J'){
    //cout<<"i "<<i<<" f "<<f[i]<<" fb "<<fb[i]<<endl;
    tot+=f[i]*fb[i];
  }
  //cout<<fb[0];
  cout<<tot;

}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:35:44: warning: 'sumf' may be used uninitialized in this function [-Wmaybe-uninitialized]
       if(i!=0&&tab[i-1][y]=='J')fb[y]+=sumf-prefb[i-1][y];
                                        ~~~~^~~~~~~~~~~~~~

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