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#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
ifstream in("rucsac.in");
ofstream out("rucsac.out");
int n,g,giz,p;
int m[5][10010];
int main()
{
in>>n;
in>>g;
for(int i=1;i<=n;i++)
{
in>>giz;
in>>p;
for(int j=1;j<=g;++j)
{
m[1][j]=max(m[1-1][j],m[1][j-1]);
if(j>=giz&&m[0][j-giz]+p>m[1][j])
{
m[1][j]=m[0][j-giz]+p;
}
}
for(int j=1;j<=g;j++)
{
m[0][j]=m[1][j];
}
}
out<<m[1][g];
return 0;
}