Submission #963928

#	Time	Username	Problem	Language	Result	Execution time	Memory
963928		Mardonbekhazratov	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"

using namespace std;

string guess_sequence(int N) {
  string p = "";
  if(press("AB")){
    if(press("A")) p+="A";
    else p+="B";
  }
  else{
    if(press("X")) p+="X";
    else p+="Y";
  }
  vector<char>d={"A","B","X","Y"};
  for(int i=0;i<4;i++){
    if(d[i]==p[0]){
      d.erase(d.begin()+i);
    }
  }
  for(int i=2;i<n;i++){
    string f1=p+d[0]+d[0];
    string f2=p+d[0]+d[1];
    string f3=p+d[0]+d[2];
    string f4=p+d[1];
    int x=press(f1+f2+f3+f4);
    if(x==i-1){
      p+=d[2];
    }
    else if(x==i){
      p+=d[1];
    }
    else{
      p+=d[0];
    }
  }
  for(int i=0;i<2;i++){
    string f=p+d[i];
    if(press(f)==n){
      p+=d[i];
      break;
    }
    if(i==1) p+=d[2];
  }
  return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:15:3: error: 'vector' was not declared in this scope
   15 |   vector<char>d={"A","B","X","Y"};
      |   ^~~~~~
combo.cpp:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include "combo.h"
  +++ |+#include <vector>
    2 | 
combo.cpp:15:10: error: expected primary-expression before 'char'
   15 |   vector<char>d={"A","B","X","Y"};
      |          ^~~~
combo.cpp:17:8: error: 'd' was not declared in this scope
   17 |     if(d[i]==p[0]){
      |        ^
combo.cpp:21:17: error: 'n' was not declared in this scope
   21 |   for(int i=2;i<n;i++){
      |                 ^
combo.cpp:22:17: error: 'd' was not declared in this scope
   22 |     string f1=p+d[0]+d[0];
      |                 ^
combo.cpp:38:16: error: 'd' was not declared in this scope
   38 |     string f=p+d[i];
      |                ^
combo.cpp:39:18: error: 'n' was not declared in this scope
   39 |     if(press(f)==n){
      |                  ^