#include <cstdio>
#define LIM 20000

using namespace std;

int d[LIM+10];
int main()
{
    freopen("rucsac.in","r",stdin);
    freopen("rucsac.out","w",stdout);
    int n,g,i,j,w,p;
    scanf("%d%d",&n,&g);
    for(i=1;i<=n;++i)
    {
        scanf("%d%d",&w,&p);
        for(j=g;j>=0;--j)
            if(d[j]+p>d[j+w])
                d[j+w]=d[j]+p;
    }
    for(i=g;i>=1;--i)
        if(d[i]!=LIM)
        {
            printf("%d",d[i]);
            return 0;
        }
    return 0;
}