Submission #157667

#	Time	Username	Problem	Language	Result	Execution time	Memory
157667		InfiniteJest	Bitaro the Brave (JOI19_ho_t1)	C++14	50 / 100	1072 ms	127932 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];
vector<pair<int,int> > v;

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++;
      else if(tab[i][y]=='I')sump[y]++;
      else v.pb(mp(i,y));
      prefb[i][y]=sum;
      pref[i][y]=sump[y];
    }
  }
  /*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<v.size();i++)tot+=(prefb[v[i].fi][w-1]-prefb[v[i].fi][v[i].se])*(pref[h-1][v[i].se]-pref[v[i].fi][v[i].se]);
  cout<<tot;

}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:46:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<v.size();i++)tot+=(prefb[v[i].fi][w-1]-prefb[v[i].fi][v[i].se])*(pref[h-1][v[i].se]-pref[v[i].fi][v[i].se]);
               ~^~~~~~~~~

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