func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int x1, y1, x2, y2;     cin >> x1 >> y1 >> x2 >> y2;     if (x1 == x2 && y1 == y2) {       cout <<  10 ;       return;     }     if (x1 == x2) {       cout << 2 * (abs(y2 - y1) + 1) + 4;       return;     }     if (y1 == y2) {       cout << 2 * (abs(x2 - x1) + 1) + 4;       return;     }     cout << 2 * (abs(x2 - x1) + abs(y2 - y1) + 2);   }   int main() {     solve();     return 0;   }   