include[HTML_REMOVED]
include[HTML_REMOVED]
using namespace std;
const int N=1010;
int dp[N][N];
int v[N],w[N];
int main()
{
int n,m;
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(j>=v[i])
{
dp[i][j]=max(dp[i-1][j],dp[i-1][j-v[i]]+w[i]);
}
else
{
dp[i][j]=dp[i-1][j];
}
}
}
cout<<dp[n][m]<<endl;
return 0;
}