please help me with this code for Sums in Triangle

#include<iostream.h>
int main()
{
    int n,s[50]={0},n1;
    cin>>n;
    n1=n;
    while(n)
    {
            int t,temp;
            int i=0,k;
            int sum=0;
            int a[50];
            cin>>t;
            temp=t;
            while(t)
            {k=0;
            while(k<t)
            {
            cin>>a[i];
            i++;
            k++;
            }
            t--;
            }
            k=0;
            int sum0,sum1;
            for(i=0;i<temp;i++)
            {
                               if(i==(temp-1))
                               {
                                  sum0=sum+a[k];
                                  k++;
                                  sum1=sum+a[k];
                               }
                               else
                               {
                                  sum=sum+a[k];
                                  k=k+i+1;
                               }
            }
            if(sum0>sum1)
            s[n]=sum0;
            else
            s[n]=sum1;
    n--;
    }
    while(n1)
    {
           cout<<s[n1]<<endl;
            n1--;
    }
    return 0;
}