func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[100010], ar[100010];   int main() {     int n, track = -100002, i;     cin >> n;     for (i = 1; i <= n; i++) {       cin >> a[i];       ar[a[i]] = ar[a[i] - 1] + 1;       track = max(ar[a[i]], track);     }     cout << n - track << endl;   }   