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Cod sursa(job #328192)
#include <algorithm>
#define DIM 10005
using namespace std;
struct truck {int c,t;} a[DIM];
int n,m,sol,solp,maxt=1<<31-1;
int minim (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=minim (maxt,m/a[i].c*2*a[i].t);
else
maxt=minim (maxt,(m/a[i].c+1)*2*a[i].t);
}
}
int test (int val)
{
int i,nrc;
for (nrc=0, i=1; i<=n; ++i)
nrc+=a[i].c*(val/(2*a[i].t));
return nrc>=m;
}
int minim_pers ()
{
int i,nrc;
for (nrc=0, i=1; i<=n; ++i)
{
nrc+=a[i].c*(sol/(2*a[i].t));
if (nrc>=m)
return i;
}
return n;
}
int cmp (truck a,truck b)
{
return a.c*(sol/(2*a.t))>b.c*(sol/(2*b.t));
}
void solve ()
{
int st,dr,mij;
for (st=1, dr=maxt; st<=dr; )
{
mij=(st+dr)/2;
if (test (mij))
{
sol=mij;
dr=mij-1;
}
else
st=mij+1;
}
sort (a+1,a+n+1,cmp);
solp=minim_pers ();
printf ("%d %d",sol,solp);
}
int main ()
{
freopen ("garaj.in","r",stdin);
freopen ("garaj.out","w",stdout);
read ();
solve ();
return 0;
}