UVA 12468 C++

#include <iostream>
using namespace std;
int main()
{
int a, b;
while (cin >> a, cin >> b)
{
if (a == -1 && b == -1)
break;
if (a > b)
{
if ((a - b) > 50)
cout << b + 100 - a << endl;
else
cout << a - b << endl;
}
else
{

if ((b - a) > 50)
cout << a + 100 - b << endl;
else
cout << b - a << endl;
}
}
return 0;
}