#include <iostream>
#define NMAX 100005

using namespace std;
int n,T,i,Max,j;
int G[NMAX],C[NMAX],v[NMAX];

int main()
{
    freopen("rucsac.in","r",stdin);
    freopen("rucsac.out","w",stdout);
    scanf("%d%d",&n,&T);
    for(i=1;i<=n;++i)
        scanf("%d%d",&G[i],&C[i]);
    Max=0;
    for(i=1;i<=n;++i)
    {
        for(j=T-G[i];j>=0;--j)
        {
            if(v[j+G[i]] < v[j] + C[i])
            {
                v[j+G[i]]=v[j]+C[i];
                if(v[j+G[i]] > Max) Max=v[j+G[i]];
            }
        }
    }
    printf("%d\n",Max);
    return 0;
}