Cod sursa(job #1646152)

Utilizator PopoviciRobertPopovici Robert PopoviciRobert Data 10 martie 2016 15:15:27
Problema Garaj Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.2 kb
#include <cstdio>
#define MAXN 100000
int cost[MAXN],timp[MAXN],con,m;
inline long long cauta(int t,int n){
    long long s=0;
    int i;
    con=0;
    for(i=0;i<n;i++){
        s=s+1LL*cost[i]*(t/(timp[i]*2));
        if(t/(2*timp[i])>0&&s<m)
              con++;
    }
    return s;
}
inline void swap(int b,int e,int *v){
    int aux=v[b];
    v[b]=v[e];
    v[e]=aux;
}
void myqsort(int begin,int end){
    int b=begin,e=end,pivot=(b+e)/2;
    while(b<=e){
        while(cost[b]*timp[pivot]<timp[b]*cost[pivot]) b++;
        while(cost[e]*timp[pivot]>timp[e]*cost[pivot]) e--;
        if(b<=e){
            swap(b,e,cost);
            swap(b,e,timp);
            b++;e--;
        }
    }
    if(begin<e) myqsort(begin,e);
    if(b<end) myqsort(b,end);
}
int main(){
    FILE*fi,*fout;
    int n,rez,pas,i;
    fi=fopen("garaj.in" ,"r");
    fout=fopen("garaj.out" ,"w");
    fscanf(fi,"%d%d" ,&n,&m);
    for(i=0;i<n;i++)
        fscanf(fi,"%d%d" ,&cost[i],&timp[i]);
    myqsort(0,n-1);
    rez=0;
    for(pas=1<<30;pas;pas>>=1)
       if(cauta(rez+pas,n)<m)
          rez+=pas;
    fprintf(fout,"%d %d" ,rez+1,con);
    fclose(fi);
    fclose(fout);
    return 0;
}