Cod sursa(job #471067)

Utilizator eudanipEugenie Daniel Posdarascu eudanip Data 16 iulie 2010 19:46:27
Problema Garaj Scor 60
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.91 kb
#include<stdio.h>
#include<algorithm>
using namespace std;

#define ll long long

ll dr,st,mij,s,sol;
int n,m,vec[100006];

struct str
{
    int x,y;
};
str v[100006];

int main ()
{
    int i;
    freopen("garaj.in","r",stdin);
    freopen("garaj.out","w",stdout);
    scanf("%d%d",&n,&m);
    for(i=1;i<=n;i++)
        scanf("%d%d",&v[i].x,&v[i].y);
    st=1;dr=m;
    dr*=1000;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        s=0;
        for(i=1;i<=n;i++)
            s+=v[i].x*((mij/v[i].y)/2);
        if(s>=m)
        {
            sol=mij;
            dr=mij-1;
        }
        else
            st=mij+1;
    }
    printf("%lld ",sol);
    for(i=1;i<=n;i++)
        vec[i]=v[i].x*(ll)((sol/v[i].y)/2);
    sort(vec+1,vec+n+1);
    sol=0;
    for(i=n;m>0;i--)
    {
        m-=vec[i];
        sol++;
    }
    printf("%lld\n",sol);
    return 0;
}