answer.code:4:1: error: stray ‘\240’ in program
    4 | <a0> <a0> int n;cin>>n;
      | ^~~~
answer.code:4:3: error: stray ‘\240’ in program
    4 | <a0> <a0> int n;cin>>n;
      |      ^~~~
answer.code:5:1: error: stray ‘\240’ in program
    5 | <a0> <a0> cout<<"? "<<1<<endl;
      | ^~~~
answer.code:5:3: error: stray ‘\240’ in program
    5 | <a0> <a0> cout<<"? "<<1<<endl;
      |      ^~~~
answer.code:6:1: error: stray ‘\240’ in program
    6 | <a0> <a0> int x;cin>>x;
      | ^~~~
answer.code:6:3: error: stray ‘\240’ in program
    6 | <a0> <a0> int x;cin>>x;
      |      ^~~~
answer.code:7:1: error: stray ‘\240’ in program
    7 | <a0> <a0> if(x==0){
      | ^~~~
answer.code:7:3: error: stray ‘\240’ in program
    7 | <a0> <a0> if(x==0){
      |      ^~~~
answer.code:8:1: error: stray ‘\240’ in program
    8 | <a0> <a0> <a0> <a0> cout<<"! 1"<<endl;
      | ^~~~
answer.code:8:3: error: stray ‘\240’ in program
    8 | <a0> <a0> <a0> <a0> cout<<"! 1"<<endl;
      |      ^~~~
answer.code:8:5: error: stray ‘\240’ in program
    8 | <a0> <a0> <a0> <a0> cout<<"! 1"<<endl;
      |           ^~~~
answer.code:8:7: error: stray ‘\240’ in program
    8 | <a0> <a0> <a0> <a0> cout<<"! 1"<<endl;
      |                ^~~~
answer.code:9:1: error: stray ‘\240’ in program
    9 | <a0> <a0> <a0> <a0> return 0;
      | ^~~~
answer.code:9:3: error: stray ‘\240’ in program
    9 | <a0> <a0> <a0> <a0> return 0;
      |      ^~~~
answer.code:9:5: error: stray ‘\240’ in program
    9 | <a0> <a0> <a0> <a0> return 0;
      |           ^~~~
answer.code:9:7: error: stray ‘\240’ in program
    9 | <a0> <a0> <a0> <a0> return 0;
      |                ^~~~
answer.code:10:1: error: stray ‘\240’ in program
   10 | <a0> <a0> }
      | ^~~~
answer.code:10:3: error: stray ‘\240’ in program
   10 | <a0> <a0> }
      |      ^~~~
answer.code:11:1: error: stray ‘\240’ in program
   11 | <a0> <a0> int l=2,r=n;
      | ^~~~
answer.code:11:3: error: stray ‘\240’ in program
   11 | <a0> <a0> int l=2,r=n;
      |      ^~~~
answer.code:12:1: error: stray ‘\240’ in program
   12 | <a0> <a0> int cnt=1;
      | ^~~~
answer.code:12:3: error: stray ‘\240’ in program
   12 | <a0> <a0> int cnt=1;
      |      ^~~~
answer.code:13:1: error: stray ‘\240’ in program
   13 | <a0> <a0> while(l<=r){
      | ^~~~
answer.code:13:3: error: stray ‘\240’ in program
   13 | <a0> <a0> while(l<=r){
      |      ^~~~
answer.code:14:1: error: stray ‘\240’ in program
   14 | <a0> <a0> <a0> <a0> int mid=(l+r)/2;
      | ^~~~
answer.code:14:3: error: stray ‘\240’ in program
   14 | <a0> <a0> <a0> <a0> int mid=(l+r)/2;
      |      ^~~~
answer.code:14:5: error: stray ‘\240’ in program
   14 | <a0> <a0> <a0> <a0> int mid=(l+r)/2;
      |           ^~~~
answer.code:14:7: error: stray ‘\240’ in program
   14 | <a0> <a0> <a0> <a0> int mid=(l+r)/2;
      |                ^~~~
answer.code:15:1: error: stray ‘\240’ in program
   15 | <a0> <a0> <a0> <a0> cout<<"? "<<mid<<endl;
      | ^~~~
answer.code:15:3: error: stray ‘\240’ in program
   15 | <a0> <a0> <a0> <a0> cout<<"? "<<mid<<endl;
      |      ^~~~
answer.code:15:5: error: stray ‘\240’ in program
   15 | <a0> <a0> <a0> <a0> cout<<"? "<<mid<<endl;
      |           ^~~~
answer.code:15:7: error: stray ‘\240’ in program
   15 | <a0> <a0> <a0> <a0> cout<<"? "<<mid<<endl;
      |                ^~~~
answer.code:16:1: error: stray ‘\240’ in program
   16 | <a0> <a0> <a0> <a0> cin>>x;
      | ^~~~
answer.code:16:3: error: stray ‘\240’ in program
   16 | <a0> <a0> <a0> <a0> cin>>x;
      |      ^~~~
answer.code:16:5: error: stray ‘\240’ in program
   16 | <a0> <a0> <a0> <a0> cin>>x;
      |           ^~~~
answer.code:16:7: error: stray ‘\240’ in program
   16 | <a0> <a0> <a0> <a0> cin>>x;
      |                ^~~~
answer.code:17:1: error: stray ‘\240’ in program
   17 | <a0> <a0> <a0> <a0> if(x==cnt){
      | ^~~~
answer.code:17:3: error: stray ‘\240’ in program
   17 | <a0> <a0> <a0> <a0> if(x==cnt){
      |      ^~~~
answer.code:17:5: error: stray ‘\240’ in program
   17 | <a0> <a0> <a0> <a0> if(x==cnt){
      |           ^~~~
answer.code:17:7: error: stray ‘\240’ in program
   17 | <a0> <a0> <a0> <a0> if(x==cnt){
      |                ^~~~
answer.code:18:1: error: stray ‘\240’ in program
   18 | <a0> <a0> <a0> <a0> <a0> <a0> cout<<"! "<<mid<<endl;
      | ^~~~
answer.code:18:3: error: stray ‘\240’ in program
   18 | <a0> <a0> <a0> <a0> <a0> <a0> cout<<"! "<<mid<<endl;
      |      ^~~~
answer.code:18:5: error: stray ‘\240’ in program
   18 | <a0> <a0> <a0> <a0> <a0> <a0> cout<<"! "<<mid<<endl;
      |           ^~~~
answer.code:18:7: error: stray ‘\240’ in program
   18 | <a0> <a0> <a0> <a0> <a0> <a0> cout<<"! "<<mid<<endl;
      |                ^~~~
answer.code:18:9: error: stray ‘\240’ in program
   18 | <a0> <a0> <a0> <a0> <a0> <a0> cout<<"! "<<mid<<endl;
      |                     ^~~~
answer.code:18:11: error: stray ‘\240’ in program
   18 | <a0> <a0> <a0> <a0> <a0> <a0> cout<<"! "<<mid<<endl;
      |                     ...