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#include <bits/stdc++.h>
using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int n, g, w[5005], p[5005], dp[2][10005];
int main() {
///dp[i][j]=profitul maxim pe care il putem obtine selectand o submultime a primelor i elemente, a caror greutate este j
///recurenta este:dp[i][j]=max(dp[i-1][j], dp[i-1][j-w[i]]+p[i]), adica maximul dintre situatia in care nu adaugam nimic si
///situatia in care adaugam elementul i cu greutatea w[i]
fin>>n>>g;
for(int i=1; i<=n; i++) {
fin >> w[i] >> p[i];
}
int l=0;
for(int i=1; i<=n; i++, l=1-l)
{
for(int j=0; j<=g; j++)
{
dp[1-l][j]=dp[l][j];
if(w[i]<=j)
{
dp[1-l][j]=max(dp[1-l][j], dp[l][j-w[i]]+p[i]);
}
}
}
fout<<dp[l][g];
return 0;
}