func_code_string: #include <bits/stdc++.h>   using namespace std;   int st(int x, int pos) { return x = x | (1 << pos); }   int Reset(int x, int pos) { return x = x & ~(1 << pos); }   int main() {     long long x1, y1, x2, y2;     cin >> x1 >> y1 >> x2 >> y2;     if (x1 == x2) {       cout << 4 + 2 * (abs(y1 - y2) + 1) << endl;     } else if (y1 == y2) {       cout << 4 + 2 * (abs(x1 - x2) + 1) << endl;     } else       cout << (abs(x1 - x2) + 1 + abs(y1 - y2) + 1) * 2 << endl;   }   