Submission #1142381

#	Time	Username	Problem	Language	Result	Execution time	Memory
1142381		FZ_Laabidi	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
string get_sequence(int n){
    string p = "";
    string trash = "AB";
    int c = press(trash);
    if(c==1){
        c = press("A");
        if(c==1)p+="A";
        else p+="B";
    }
    else{
        c = press("X");
        if(c==1)p+="X";
        else p+="Y";
    }
    string ss = "ABXY"; 
    string b, x, y;
    for(int i=0; i<4; i++){
        if(ss[i]==p[0])continue ;
        if(i<=1)b = ss[i];
        else if(i==2)x = ss[i];
        else y = ss[i];
    }
    int count = 1;
    for(int i=0; i<n-1; i++){
        string t = p+b+p+x+y+p+x+x+p+x+b;
        c = press(t);
        if(c==count)p+=y;
        else if(c==count+1)p+=b;
        else p+=y;
    }
    if(n>1){
        string t = p+x+p+b;
        c = press(t);
        if(c==n){
            c = press(p+x);
            if(c==n)p+=x;
            else p+=b;
        }
        else p+=y;
    }
    return p;

}

Compilation message (stderr)

/usr/bin/ld: /tmp/cceEPmOo.o: in function `main':
grader.cpp:(.text.startup+0x4c): undefined reference to `guess_sequence[abi:cxx11](int)'
collect2: error: ld returned 1 exit status