Language: C++

‪#include <bits/stdc++.h>‬
‪#define l_ength size‬
‪const int inf = (1<<30);‬
‪const int mod = 1000000007;‬
‪using ll = long long;‬
‪using namespace std;‬

‪int main(){‬
‪	ll X, Y;‬
‪	cin >> X >> Y;‬
‪	cout << ( log2(Y)-log2(X) ) + 1 << endl;‬
‪}‬

Compiler output:
a.cc:1: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
    1 | <U+202A>#include <bits/stdc++.h><U+202C>
      | ~~~~~~~~ 
      | |       |
      | |       end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:1:1: error: stray '#' in program
    1 | ‪#include <bits/stdc++.h>‬
      | ^
a.cc:2: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
    2 | <U+202A>#define l_ength size<U+202C>
      | ~~~~~~~~ 
      | |       |
      | |       end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:2:1: error: stray '#' in program
    2 | ‪#define l_ength size‬
      | ^
a.cc:3:5: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
    3 | <U+202A>const int inf = (1<<30);<U+202C>
      | ~~~~~~~~    ^
      | |           |
      | |           end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:4:5: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
    4 | <U+202A>const int mod = 1000000007;<U+202C>
      | ~~~~~~~~    ^
      | |           |
      | |           end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:5:5: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
    5 | <U+202A>using ll = long long;<U+202C>
      | ~~~~~~~~    ^
      | |           |
      | |           end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:6:5: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
    6 | <U+202A>using namespace std;<U+202C>
      | ~~~~~~~~    ^
      | |           |
      | |           end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:8:3: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
    8 | <U+202A>int main(){<U+202C>
      | ~~~~~~~~  ^
      | |         |
      | |         end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:9: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
    9 | <U+202A>        ll X, Y;<U+202C>
      | ~~~~~~~~ 
      | |       |
      | |       end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:10: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
   10 | <U+202A>        cin >> X >> Y;<U+202C>
      | ~~~~~~~~ 
      | |       |
      | |       end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:11: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
   11 | <U+202A>        cout << ( log2(Y)-log2(X) ) + 1 << endl;<U+202C>
      | ~~~~~~~~ 
      | |       |
      | |       end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:12: warning: unpaired UTF-8 bidirectional control character detected [-Wbidi-chars=]
   12 | <U+202A>}<U+202C>
      | ~~~~~~~~ 
      | |       |
      | |       end of bidirectional context
      | U+202A (LEFT-TO-RIGHT EMBEDDING)
a.cc:1:1: error: '\U0000202a' does not name a type
    1 | ‪#include <bits/stdc++.h>‬
      |  
a.cc:3:25: error: '\U0000202c' does not name a type
    3 | ‪const int inf = (1<<30);‬
      |                          
a.cc:4:28: error: '\U0000202c' does not name a type
    4 | ‪const int mod = 1000000007;‬
      |                             
a.cc:5:22: error: '\U0000202c' does not name a type
    5 | ‪using ll = long long;‬
      |                       
a.cc:6:21: error: '\U0000202c' does not name a type
    6 | ‪using namespace std;‬
      |                      
a.cc:12:2: error: '\U0000202c' does not name a type
   12 | ‪}‬
      |