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#include <iostream>
#include <fstream>
#include <algorithm>
#define GMAX 10001
using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int N, G;
int W[GMAX], P[GMAX];
int Rucsac(int G, int W[], int P[], int N) {
int K[N+1][G+1];
for(int i=0; i<=N; i++) {
for(int j=0; j<=G; j++) {
if (!i || !j)
K[i][j]=0;
else if (W[i-1]<=j)
K[i][j]=max(P[i]+K[i-1][j-W[i-1]], K[i-1][j]);
else
K[i][j]=K[i-1][j];
}
}
return K[N][G];
}
int main()
{
fin>>N>>G;
for(int i=1; i<=N; i++) fin>>W[i]>>P[i];
fout<<Rucsac(G, W, P, N);
return 0;
}