Language: C++

#include <bits/stdc++.h>                                                                                           │5
  2 using namespace std;                                                                                               │
  3                                                                                                                    │[+] saved to: test/sample-3.in
  4 typedef unsigned long long ull;                                                                                    │[x] output: sample-3
  5 typedef long long ll;                                                                                              │5
  6 typedef pair<int, int> pii;                                                                                        │
  7 typedef pair<ll, ll> pll;                                                                                          │[+] saved to: test/sample-3.out
  8 typedef pair<double, double> pdd;                                                                                  │17:27:02:AGC024 $ oj test
  9 const ull mod = 1e9 + 7;                                                                                           │[*] 3 cases found
 10 #define REP(i,n) for(int i=0;i<(int)n;++i)                                                                         │time: illegal option -- f
 11                                                                                                                    │usage: time [-lp] command.
 12 //debug                                                                                                            │[!] GNU time is not available: time
 13 #define dump(x)  cerr << #x << " = " << (x) << endl;                                                               │
 14 #define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;                │[*] sample-1
 15                                                                                                                    │i = 0
 16 template<class S, class T> ostream& operator << (ostream& os, const pair<S, T> v){                                 │j = 1
 17   os << "(" << v.first << ", " << v.second << ")"; return os;                                                      │i = 2
 18 }                                                                                                                  │j = 3
 19 template<class T> ostream& operator << (ostream& os, const vector<T> v){                                           │0 2 1 3
 20   for(int i = 0; i < v.size(); i++){if(i > 0){os << " ";} os << v[i];} return os;                                  │[x] time: 0.004073 sec
 21 }                                                                                                                  │[+] AC
 22 template<class T> ostream& operator << (ostream& os, const vector<vector<T>> v){                                   │
 23   for(int i = 0; i < v.size(); i++){if(i > 0){os << endl;} os << v[i];} return os;                                 │[*] sample-2
 24 }                                                                                                                  │i = 0
 25                                                                                                                    │j = 0
 26 int main(){                                                                                                        │i = 1
 27   cin.tie(0);                                                                                                      │j = 1
 28   ios::sync_with_stdio(false);                                                                                     │i = 2
 29                                                                                                                    │j = 3
 30   ll N;                                                                                                            │i = 4
 31   cin >> N;                                                                                                        │j = 5
 32   vector<ll> p(N);                                                                                                 │3 1 0 4 2 5
 33   REP(i, N) cin >> p[i];                                                                                           │[x] time: 0.003576 sec
 34                                                                                                                    │[+] AC
 35   vector<ll> q(N);                                                                                                 │
 36   REP(i, N) q[p[i]-1] = i;                                                                                         │[*] sample-3
 37   ll res = -1;                                                                                                     │i = 0
 38   REP(i, N){                                                                                                       │j = 1
 39     ll j = i;                                                                                                      │i = 2
 40     while(j<N-1 && q[j]<q[j+1]) j++;                                                                               │j = 4
 41     res = max(res, j-i+1);                                                                                         │i = 5
 42     dump(i)                                                                                                        │j = 7
 43     dump(j)                                                                                                        │2 3 1 5 7 0 4 6
 44     i = j;                                                                                                         │[x] time: 0.003522 sec
 45   }                                                                                                                │[+] AC
 46   cerr << q << endl;                                                                                               │
 47   cout << N - res << endl;                                                                                         │[x] slowest: 0.004073 sec  (for sample-1)
 48   return 0;                                                                                                        │[+] test success: 3 cases
 49 }                           

Compiler output:
a.cc:1:116: error: extended character │ is not valid in an identifier
    1 | #include <bits/stdc++.h>                                                                                           │5
      |                                                                                                                    ^
a.cc:1:116: warning: extra tokens at end of #include directive
    1 | #include <bits/stdc++.h>                                                                                           │5
      |                                                                                                                    ^~
a.cc:2:120: error: extended character │ is not valid in an identifier
    2 |   2 using namespace std;                                                                                               │
      |                                                                                                                        ^
a.cc:3:120: error: extended character │ is not valid in an identifier
    3 |   3                                                                                                                    │[+] saved to: test/sample-3.in
      |                                                                                                                        ^
a.cc:4:120: error: extended character │ is not valid in an identifier
    4 |   4 typedef unsigned long long ull;                                                                                    │[x] output: sample-3
      |                                                                                                                        ^
a.cc:5:120: error: extended character │ is not valid in an identifier
    5 |   5 typedef long long ll;                                                                                              │5
      |                                                                                                                        ^
a.cc:6:120: error: extended character │ is not valid in an identifier
    6 |   6 typedef pair<int, int> pii;                                                                                        │
      |                                                                                                                        ^
a.cc:7:120: error: extended character │ is not valid in an identifier
    7 |   7 typedef pair<ll, ll> pll;                                                                                          │[+] saved to: test/sample-3.out
      |                                                                                                                        ^
a.cc:8:120: error: extended character │ is not valid in an identifier
    8 |   8 typedef pair<double, double> pdd;                                                                                  │17:27:02:AGC024 $ oj test
      |                                                                                                                        ^
a.cc:9:120: error: extended character │ is not valid in an identifier
    9 |   9 const ull mod = 1e9 + 7;                                                                                           │[*] 3 cases found
      |                                                                                                                        ^
a.cc:10:5: error: stray '#' in program
   10 |  10 #define REP(i,n) for(int i=0;i<(int)n;++i)                                                                         │time: illegal option -- f
      |     ^
a.cc:10:120: error: extended character │ is not valid in an identifier
   10 |  10 #define REP(i,n) for(int i=0;i<(int)n;++i)                                                                         │time: illegal option -- f
      |                                                                                                                        ^
a.cc:11:120: error: extended character │ is not valid in an identifier
   11 |  11                                                                                                                    │usage: time [-lp] command.
      |                                                                                                                        ^
a.cc:13:5: error: stray '#' in program
   13 |  13 #define dump(x)  cerr << #x << " = " << (x) << endl;                                                               │
      |     ^
a.cc:13:30: error: stray '#' in program
   13 |  13 #define dump(x)  cerr << #x << " = " << (x) << endl;                                                               │
      |                              ^
a.cc:13:120: error: extended character │ is not valid in an identifier
   13 |  13 #define dump(x)  cerr << #x << " = " << (x) << endl;                                                               │
      |                                                                                                                        ^
a.cc:14:5: error: stray '#' in program
   14 |  14 #define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;                │[*] sample-1
      |     ^
a.cc:14:30: error: stray '#' in program
   14 |  14 #define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;                │[*] sample-1
      |                              ^
a.cc:14:120: error: extended character │ is not valid in an identifier
   14 |  14 #define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;                │[*] sample-1
      |                                                                                                                        ^
a.cc:15:120: error: extended character │ is not valid in an identifier
   15 |  15                                                                                                                    │i = 0
      |                                                                                                                        ^
a.cc:16:120: error: extended character │ is not valid in an identifier
   16 |  16 template<class S, class T> ostream& operator << (ostream& os, const pair<S, T> v){                                 │j = 1
      |                                                                                                                        ^
a.cc:17:120: error: extended character │ is not valid in an identifier
   17 |  17   os << "(" << v.first << ", " << v.second << ")"; return os;                                                      │i = 2
      |                                                                                                                        ^
a.cc:18:120: error: extended character │ is not valid in an identifier
   18 |  18 }                                                                                                                  │j = 3
      |                                                                                                                        ^
a.cc:19:120: error: extended character │ is not valid in an identifier
   19 |  19 template<class T> ostream& operator << (ostream& os, const vector<T> v){                                           │0 2 1 3
      |                                                                                                                        ^
a.cc:20:120: error: extended character │ is not valid in an identifier
   20 |  20   for(int i = 0; i < v.size(); i++){if(i > 0){os << " ";} os << v[i];} return os;                                  │[x] time: 0.004073 sec
      |                                                                                                                        ^
a.cc:21:120: error: extended character │ is not valid in an identifier
   21 |  21 }                                                                                                                  │[+] AC
      |                                                                                                                        ^
a.cc:22:120: error: extended character │ is not valid in an identifier
   22 |  22 template<class T> ostream& operator << (ostream& os, const vector<vector<T>> v){                                   │
      |                                                                                                                        ^
a.cc:23:120: error: extended character │ is not valid in an identifier
   23 |  23   for(int i = 0; i < v.size(); i++){if(i > 0){os << endl;} os << v[i];} return os;                                 │[*] sample-2
      |                                                                                                                        ^
a.cc:24:120: error: extended character │ is not valid in an identifier
   24 |  24 }                                                                                                                  │i = 0
      |                                                                                                                        ^
a.cc:25:120: error: extended character │ is not valid in an identifier
   25 |  25                                                                                                                    │j = 0
      |                                                                                                                        ^
a.cc:26:120: error: extended character │ is not valid in an identifier
   26 |  26 int main(){                                                                                                        │i = 1
      |                                                                                                                        ^
a.cc:27:120: error: extended character │ is not valid in an identifier
   27 |  27   cin.tie(0);                                                                                                      │j = 1
      |