Cod sursa(job #1373770)

Utilizator patrutoiuandreipatrutoiu andrei patrutoiuandrei Data 4 martie 2015 20:32:04
Problema Garaj Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.9 kb
#include <fstream>
#include <algorithm>
using namespace std;
ifstream fin("garaj.in");
ofstream fout("garaj.out");
int n,m,nr,t,sum,st,dr,sol,i,mij,a[100001];
struct virgula{
    int x,y,z;
}v[100001];
int verif(int val)
{
    int sol=0;
    for(i=1;i<=n;i++)
    {
        sol+=v[i].x*(val/v[i].y);
        if(sol>=m)
            return 1;
    }
    return sol>=m;
}
int main()
{
    fin>>n>>m;
    for(i=1;i<=n;i++)
    {
        fin>>v[i].x>>v[i].y;
        v[i].y*=2;
    }
    st=1;dr=2000000000;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(verif(mij))
        {
            sol=mij;
            dr=mij-1;
        }
        else
            st=mij+1;
    }
    fout<<sol<<' ';
    for(i=1;i<=n;i++)
        a[i]=v[i].x*(sol/v[i].y);
    sort(a+1,a+n+1);
    sol=0;
    for(i=n;i>=1;i--)
    {
        sol+=a[i];
        nr++;
        if(sol>=m)
            break;
    }
    fout<<nr;

    return 0;
}