include [HTML_REMOVED]

include [HTML_REMOVED]

include [HTML_REMOVED]

using namespace std;

const int N=1010;

int v[N],w[N];
int f[N][N];
int n,m;

int main()
{
cin>>n>>m;
for(int i=1;i<=n;i) cin>>v[i]>>w[i];
for(int i=1;i<=n;i)
{
for(int j=1;j<=m;j++)
{
if(v[i]>j)
{
f[i][j]=f[i-1][j];
}
else
f[i][j]=max(f[i-1][j],f[i-1][j-v[i]]+w[i]);
}
}
cout<<f[n][m]<<endl;
return 0;
}