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#include<bits/stdc++.h>
using namespace std;
ifstream fin("rucsac1.in");
ofstream fout("rucsac1.out");
#define NMAX 10005
vector<pair<int,int>> v;
int dp[2][NMAX] ;
int main()
{
int n,gmax;
fin>>n>>gmax;
for(int i=1;i<=n;i++)
{
int g,val;
fin>>g>>val;
v.push_back({g,val});
}
for(int i=0;i<=gmax;i++)
dp[1][i] = 0;
for(int i=1;i<=n;i++)
{
for(int j=1;j<=gmax;j++)
{
if(v[i-1].first <= j)
{
dp[2][j] = max(dp[1][j],dp[1][j-v[i-1].first] + v[i-1].second);
}
//cout<<dp[2][j]<< " ";
}
for(int j=1;j<=gmax;j++)
{
dp[1][j] = dp[2][j];
}
//cout<<endl;
}
fout<<dp[1][gmax];
}