HDU 4450 Draw Something

 1 #include <iostream>
 2 #include <cmath>
 3 using namespace std;
 4 
 5 int N;
 6 int i;
 7 int side[300];
 8 int main()
 9 {
10     while(cin >> N)
11     {
12         int sum = 0;
13         if(N == 0) return 0;
14         else
15         {
16             for(i = 0;i < N;i++)
17             {
18                 cin >> side[i];
19                 sum = side[i] * side[i] +sum;
20             }
21             cout << sum <<endl;
22         }
23     }
24     return 0;
25 }