【題解】UVa 10783 – Odd Sum

#include <iostream>
using namespace std;

int main(){
   int T, a, b;
   cin >> T;
   for(int i=1; i<=T; i++){
      cin >> a >> b;
      int sum = 0;
      cout << "Case " << i << ": ";
      for(int j=a; j<=b; j++){
         if(j%2 != 0){
            sum += j;
         }
      }
      cout << sum << '\n';
   }

}