Submission #1278305

#	Time	Username	Problem	Language	Result	Execution time	Memory
1278305		coderg300711	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;

string guess_sequence(int N) {
  string p="",s="";
  p=press("AB")?(press("A")?"A":"B"):(press("X")?"X":"Y");
  for(auto &x:"ABXY")s+=x;
  for(int i=1,k;i<N-1;i++){
    k=press(p+s[0]+s[0]+p+s[0]+s[1]+p+s[0]+s[2]+p+s[1])
    if(k==i)p+=s[2];
    else if(k==i+1)p+=s[1];
    else p+=s[0];
  }
  if(N>1){
    if(press(p+s[0])==N)p+=s[0];
    else if(press(p+s[1]))p+=s[1];
    else p+=s[2];
  }
  return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:10:56: error: expected ';' before 'if'
   10 |     k=press(p+s[0]+s[0]+p+s[0]+s[1]+p+s[0]+s[2]+p+s[1])
      |                                                        ^
      |                                                        ;
   11 |     if(k==i)p+=s[2];
      |     ~~                                                  
combo.cpp:12:5: error: 'else' without a previous 'if'
   12 |     else if(k==i+1)p+=s[1];
      |     ^~~~