#include<stdio.h>
int n,g,v[10005];

int main(){
    int i,w,p;
    freopen("rucsac.in","r",stdin);
    freopen("rucsac.out","w",stdout);
    scanf("%d %d",&n,&g);
    while(n--){
        scanf("%d %d",&w,&p);
        for(i=g-w;i>=0;i--)
            if(v[i]+p>v[i+w])
                v[i+w]=v[i]+p;
    }
    printf("%d\n",v[g]);
}