func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long b, d, s, mx, sm = 0;     cin >> b >> d >> s;     mx = max(b, max(s, d));     if (mx != b) b++;     if (mx != d) d++;     if (mx != s) s++;     sm += mx - b;     sm += mx - d;     sm += mx - s;     cout << sm << endl;     return 0;   }   