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#include <bits/stdc++.h>
#define nmax 5001
#define gmax 10001
using namespace std;
int main()
{
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int n, g;
int w[nmax], p[nmax], dp[gmax];
fin>>n>>g;
for(int i=1; i<=n; i++) {
fin>>w[i]>>p[i];
}
int sol = 0;
for(int i=1; i<=n; i++) {
for(int j=g; j>=w[i]; j--) {
if(dp[j] < dp[j-w[i]] + p[i])
dp[j] = dp[j-w[i]]+p[i];
if(dp[j]>sol) {
sol=dp[j];
}
}
}
fout<<sol<<endl;
return 0;
}