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