func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 123456;   void pre();   void post();   int n;   int mas[MAXN];   int solve[MAXN];   void read() {     cin >> n;     for (int i = 0; i < n; i++) {       scanf( %lld , &mas[i]);       solve[mas[i] - 1] = i;     }   }   int main() {     pre();     read();     int ans = 0;     int l = 0;     for (int i = 1; i < n; i++) {       if (solve[i] < solve[i - 1]) {         l = i;       }       ans = max(ans, i - l + 1);     }     ans = max(ans, n - l);     cout << n - ans;     post();     return 0;   }   void pre() {}   void post() {}   