Cod sursa(job #1112168)

Utilizator BlackLordFMI Alex Oprea BlackLord Data 19 februarie 2014 15:15:07
Problema Garaj Scor 20
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.88 kb
#include <fstream>
#include <algorithm>
using namespace std;
ifstream f("garaj.in");
ofstream g("garaj.out");
long long n, m, i, s, d, p, u, mi;

struct camion{
    long long s, t;
} v[100010];

bool verif(long long t){
    s=0;
    for(i=1; i<=n; i++)
    {
        d=t/(v[i].t*2);
        s+=v[i].s*d;
    }
    if(s>=m)
        return 1;
    return 0;
}

bool cmp(camion x, camion y){
    return ( (x.s/x.t)>(y.s/y.t) );
}

int main(){
    f>>n>>m;
    for(i=1; i<=n; i++)
        f>>v[i].s>>v[i].t;
    sort(v+1, v+n+1, cmp);
    p=1;
    u=2000000000;
    while(p<=u)
    {
        mi=(p+u)/2;
        if( verif(mi) )
            u=mi-1;
        else
            p=mi+1;
    }
    s=0;
    for(i=1; i<=n; i++)
    {
        d=p/(v[i].t*2);
        s+=v[i].s*d;
        if(s>=m)
            break;
    }
    g<<p<<' '<<i<<"\n";
    return 0;
}