hdu Super Jumping

#include"iostream"
#include"stdio.h"
#include"string.h"
#include"algorithm"
#define mx 1010
using namespace std;
__int64 n;
__int64 value[mx];
__int64 dp[mx];
int main()
{
    __int64 i,j,ans;
    while(cin>>n,n)
    {
        for(i=1;i<=n;i++)
            cin>>value[i];
        memset(dp,0,sizeof(dp));
        value[0]=0;
        ans=0;
        for(i=1;i<=n;i++)
        {
            for(j=0;j<i;j++)
            {
                if(value[j]<value[i])
                {
                    if(dp[j]+value[i]>dp[i]) dp[i]=dp[j]+value[i];
                    if(dp[i]>ans) ans=dp[i];
                }
            }
        }
        cout<<ans<<endl;
    }
    return 0;
}