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#include <iostream>
#include <fstream>
using namespace std;
int n,g,w[10005],p[10005],a[10005],b[10005];
int maxim(int x,int y)
{
if(x>y)
return x;
return y;
}
int main()
{
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
fin>>n>>g;
for(int i=1;i<=n;i++)
fin>>w[i]>>p[i];
for(int i=1;i<=n;i++)
{
for(int j=0;j<=g;j++)
{
if(w[i]<=j)
b[j]=maxim(a[j],a[j-w[i]]+p[i]);
else
b[j]=a[j];
}
for(int j=0;j<=g;j++)
a[j]=b[j];
}
fout<<b[g];
return 0;
}