func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int x, y, x1, y1, a, b, c, d, e;     cin >> x >> y >> x1 >> y1;     a = x1 - x;     b = y1 - y;     {       if (a < 0) {         c = (-1) * a;       } else         c = a;     }     {       if (b < 0) {         d = (-1) * b;       } else         d = b;     }     e = max(d, c);     cout << e;     return 0;   }   