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  1. #include "bits/stdc++.h"
  2. using namespace std ;
  3.  
  4. void sol( ){
  5.   int lo = 1, hi = 1000000, ans = -1 ;
  6.   char op ;
  7.   while( lo <= hi ){
  8.     int mid = lo + hi >> 1 ;
  9.     cout << 1 << " " << mid << endl ;
  10.     cin >> op ;
  11.     if( op == -1 ){
  12.       return ;
  13.     }
  14.     if( op == '<' ){
  15.       ans = mid ;
  16.       lo = mid+1 ;
  17.     }
  18.     else{
  19.       hi = mid-1 ;
  20.     }
  21.   }
  22.   cout << 0 << " " << ans << endl ;
  23. }
  24.  
  25. signed main( ){
  26.   sol( ) ;
  27. }
  28. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:28:1: error: expected declaration before ‘}’ token
 }
 ^
stdout
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Standard output is empty
https://ideone.com/BktYbL
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
secret

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