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#include <iostream>
#include <fstream>
using namespace std;
short t[5000][2];
//int d[150001];
short mat[5000][10000];
ifstream f("rucsac.in");
ofstream h("rucsac.out");
int main()
{
int n,g;
f>>n;
f>>g;
for(int i=1;i<=n;i++)
{
//mat[0][i]=-1;
int j,k;
f>>j;
f>>k;
t[i][0]=j;
t[i][1]=k;
}
for(int i=1;i<=n;i++)
{
for(int j=0;j<=g;j++)
{
mat[i][j]=mat[i-1][j];
if(j>=t[i][0])
mat[i][j]=max((int)mat[i-1][j-t[i][0]]+t[i][1],(int)mat[i-1][j]);
}
}
h<<mat[n][g]<<" ";
//h<<d[g];
return 0;
}