func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     std::ios::sync_with_stdio(false);     int n;     cin >> n;     vector<int> a(n);     for (int i = 0; i < n; i++) cin >> a[i];     int cur = 1, cnt = 0;     vector<int> dp(n + 1, 0);     for (int i = 0; i < n; i++) dp[a[i]] = dp[a[i] - 1] + 1;     for (int i = 1; i < n + 1; i++) cnt = max(cnt, dp[i]);     cout << n - cnt;     return 0;   }   