UVa 10789 Odd Sum

#include <iostream>
using namespace std;

int main() {
    int T, high, low, i, sum;
    cin >> T;
    for(i = 1; i <= T; i++){
        cin >> low >> high;
        sum = 0;
        (low % 2) ? low : low++;
        while(low <= high) {
            sum += low;
            low += 2;
        }
        cout << "Case " << i << ": " << sum << endl;
    }
    return 0;
}