#include <bits/stdc++.h>
using namespace std;


int dp[10001];

int main()
{
        freopen("rucsac.in","r",stdin);
     freopen("rucsac.out","w",stdout);
    int n,w;
    cin >> n >> w;
    for(int i = 1;i<=n;i++){
        int g,p;
        cin >> g >> p;
        for(int j = w;j>=0;j--){
            if(j - g >= 0) dp[j] = max(dp[j],dp[j-g]+p);
        }
    }
    cout << dp[w];

    return 0;
}