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Cod sursa(job #328187)
#include <algorithm>
#define DIM 100005
using namespace std;
struct truck {int c,t;} a[DIM];
int n,m,mij,sol,solp,maxt=1<<31-1;
int maxim (int a,int b)
{
if (a>b)
return a;
return b;
}
void read ()
{
int i;
scanf ("%d%d",&n,&m);
for (i=1; i<=n; ++i)
{
scanf ("%d%d",&a[i].c,&a[i].t);
if (m%a[i].c==0)
maxt=maxim (maxt,m/a[i].c*2*a[i].t);
else
maxt=maxim (maxt,(m/a[i].c+1)*2*a[i].t);
}
}
int cmp (truck a,truck b)
{
return a.c*(mij/(2*a.t))>b.c*(mij/(2*b.t));
}
int test (int val,int &pers)
{
int i,nrc;
for (nrc=0, i=1; i<=n; ++i)
{
nrc+=a[i].c*(val/(2*a[i].t));
pers=i;
if (nrc>=m)
return 1;
}
return 0;
}
void solve ()
{
int st,dr,pers;
for (st=1, dr=maxt; st<=dr; )
{
pers=0;
mij=(st+dr)/2;
sort (a+1,a+n+1,cmp);
if (test (mij,pers))
{
sol=mij;
solp=pers;
dr=mij-1;
}
else
st=mij+1;
}
printf ("%d %d",sol,solp);
}
int main ()
{
freopen ("garaj.in","r",stdin);
freopen ("garaj.out","w",stdout);
read ();
solve ();
return 0;
}