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#include<iostream>
#include<fstream>
using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
int w[10005];
int dp[10005][10005];
int p[10005];
int main()
{
int n,g;
fin>>n>>g;
for(int i=1;i<=n;i++){
fin>>w[i]>>p[i];
}
for(int i=1;i<=n;i++){
int lin_cur=i%2;
int lin_ant=1-lin_cur;
for(int j=0;j<=g;j++){
if(j>=w[i]){
dp[lin_cur][j]=max(dp[lin_ant][j],dp[lin_ant][j-w[i]]+p[i]) ;
}
else{
dp[lin_cur][j]=dp[lin_ant][j];
}
}
}
int res=0;
for(int i=1;i<=g;i++){
res=max(res,dp[n%2][i]);
}
fout<<res;
}