func_code_string: #include <bits/stdc++.h>   using namespace std;   const int inf = 1e9;   const int MOD = 1e9 + 7;   const int N = 0, BAR = 1e6, LIM = 5e6;   int x, y, n;   int main() {     scanf( %d , &n);     int xa = inf, xb = -inf, ya = inf, yb = -inf;     while (n--) {       scanf( %d%d , &x, &y);       x += BAR, y += BAR;       xa = min(xa, x - y - 1), xb = max(xb, x + y + 1);       ya = min(ya, x - (LIM - y + 1)), yb = max(yb, x + (LIM - y + 1));     }     int ans = 0;     int rya = (LIM - (yb - ya) / 2);     ans += (yb - ya) % 2;     int ryb = (xb - xa) / 2;     ans += (xb - xa) % 2;     ans += 2 * (ryb - rya);     cout << ans;   }   