Submission #127110

#	Time	Username	Problem	Language	Result	Execution time	Memory
127110		reda	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
using namespace std;
string guess_sequence(int N)
{

      string t = "" ,v;

      int a=press("A"),b=press("B"),x=press("Y"),y=press("Y");
      if(a){t.push_back('A');

        v= "BXY";

      }
      if(b){
        t.push_back('B');
                v= "AXY";
      }
     if(y)
     {
         t.push_back('Y');
         v="ABX";

     }

     if(x){
        t.push_back('X');
        v="ABY"   ;
     }
     int i=0;
     while(t.size()!=N)
     {
         int h=press(t+v[i%N]);
         if(h)v.push_back(v[i%N]);
         i++;
     }
     return t;
  }

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:8:13: error: 'press' was not declared in this scope
    8 |       int a=press("A"),b=press("B"),x=press("Y"),y=press("Y");
      |             ^~~~~
combo.cpp:14:10: error: 'b' was not declared in this scope
   14 |       if(b){
      |          ^
combo.cpp:18:9: error: 'y' was not declared in this scope
   18 |      if(y)
      |         ^
combo.cpp:25:9: error: 'x' was not declared in this scope
   25 |      if(x){
      |         ^
combo.cpp:30:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   30 |      while(t.size()!=N)
      |            ~~~~~~~~^~~