Submission #1142365

#	Time	Username	Problem	Language	Result	Execution time	Memory
1142365		FZ_Laabidi	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

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


string guess_sequence() {
    string P = "";
    set<char> tr = {'A', 'B', 'X', 'Y'};
    int c = press("AB");
    if(c>=1) {
        c = press("A");
        if (c==1)P+="A";
        else P+="B";
    }
    else if (c==0) {
        c = press("X");
        if (c==1)P+="X";
        else P+="Y";
    }
    tr.erase(P[0]);
    char B, X, Y;
    c=0;
    for (auto x: tr) {
        if (c==0)B = x;
        if (c==1)X = x;
        if (c==2)Y = x;
        c++;
    }
    for (int i=1; i<=N-2; i++) {
        string ty = P+X+P+B+X+P+B+Y+P+B+B;
        c = press(ty);
        if (c==1)P+=X;
        else if (c==2)P+=B;
        else P+=Y;
    }
    string ty= P+X+P+B;
    c = press(ty);
    if (c==1) {
        c = press(P+X);
        if (c==1)P+=X;
        else P+=B;
    }
    else P+=Y;
    return P;
}

//Cbx-2bx=0
// bx=0;

Compilation message (stderr)

/usr/bin/ld: /tmp/ccteQmg9.o: in function `main':
grader.cpp:(.text.startup+0x4c): undefined reference to `guess_sequence[abi:cxx11](int)'
collect2: error: ld returned 1 exit status