func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a, b;     cin >> a >> b;     a = abs(a - b);     b = a / 2;     a = a / 2 + (a & 1);     cout << (a * a + a) / 2 + (b * b + b) / 2 << endl;     return 0;   }   