func_code_string: #include <bits/stdc++.h>   using namespace std;   const double PI =       3.141592653589793238462643383279502884197169399375105820974944;   long long dist(long long a, long long b, long long c, long long d) {     return abs(a - c) + abs(b - d);   }   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long a, b, c, d;     cin >> a >> b >> c >> d;     long long ans = 1000000000;     for (long long i = c - 1; i <= c + 1; i++) {       for (long long j = d - 1; j <= d + 1; j++) {         if (i != c or j != d) {           ans = min(ans, dist(a, b, i, j));         }       }     }     cout << 2 * ans + 8 << endl;   }   