Cod sursa(job #1118692)

Utilizator acomAndrei Comaneci acom Data 24 februarie 2014 12:44:26
Problema Garaj Scor 50
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.99 kb
#include<fstream>
#include<algorithm>
using namespace std;
ifstream f("garaj.in");
ofstream g("garaj.out");
struct camion
{
    int c,t;
} a[100005];
int n,m,st,dr,mij,Tmin,Nrmin;
bool timp(int T)
{
    int i,k=m;
    for (i=1;i<=n && k>0;++i)
        k-=a[i].c*(T/a[i].t);
    if (k<=0) return true;
    else return false;
}
bool cmp(camion A, camion B)
{
    if ((double)A.c/A.t==(double)B.c/B.t) return (A.c>B.c);
    else return ((double)A.c/A.t>(double)B.c/B.t);
}
int main()
{
    int i;
    freopen("garaj.in","r",stdin);
    freopen("garaj.out","w",stdout);
    f>>n>>m;
    for (i=1;i<=n;++i)
        f>>a[i].c>>a[i].t, a[i].t<<=1;
    sort(a+1,a+n+1,cmp);
    st=1, dr=100000000;
    while (st<=dr)
    {
        mij=(st+dr)>>1;
        if (timp(mij)) dr=mij-1;
        else st=mij+1;
    }
    Tmin=st;
    for (i=1;i<=n && m>0;++i)
        if (Tmin>=a[i].t)
            ++Nrmin, m-=a[i].c*(Tmin/a[i].t);
    g<<Tmin<<' '<<Nrmin<<'\n';
    return 0;
}