Cod sursa(job #1112848)

Utilizator BlackLordFMI Alex Oprea BlackLord Data 20 februarie 2014 08:32:17
Problema Garaj Scor 50
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.02 kb
#include <cstdio>
#include <algorithm>
using namespace std;
FILE*f=fopen("garaj.in", "r");
FILE*g=fopen("garaj.out", "w");
long long n, m, i, s, d, p, u, mi, a[100010], t, nrc;

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

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

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

int main(){
    fscanf(f, "%lld %lld", &n, &m);
    for(i=1; i<=n; i++)
        fscanf(f, "%lld %lld", &v[i].s, &v[i].t);
    p=1;
    u=2LL*m;
    while(p<=u)
    {
        mi=p+(u-p)/2;
        if( verif(mi) )
            u=mi-1;
        else
            p=mi+1;
    }
    t=p;
    for(i=1; i<=n; i++)
        a[i]=(t/(v[i].t<<1))*v[i].s;
    sort(a+1, a+n+1);
    s=m;
    for(i=n; i>0; i--)
    {
        s-=a[i];
        nrc++;
        if(s<1)
            break;
    }
    fprintf(g, "%lld %lld\n", p, nrc);
    return 0;
}