Submission #1270109

#	Time	Username	Problem	Language	Result	Execution time	Memory
1270109		almaz	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

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

#define int long long
#define endl '\n'
#define ff first
#define ss second
#define pb push_back
#define all(a) a.begin(), a.end()

const int MOD = 1e9 + 7,INF = 1e18;

string guess_sequence(int n) {
	ios::sync_with_stdio(false);
    cin.tie(nullptr);

    string s = "";
	string ans = "";
	
	string a , b , c;
	
	int t = press("AB");
	
	if(t > 0){
		int f = press("A");
		if(f == 1){
			ans += "A";
			a = "B";
			b = "X";
			c = "Y";
		}
		else{
			ans += "B";
			a = "A";
			b = "X";
			c = "Y";
		}
	}
	
	else{
		int f = press("X");
		
		if(f == 1){
			ans += "X";
			a = "B";
			b = "A";
			c = "Y";
		}
		else{
			ans += "Y";
			a = "B";
			b = "X";
			c = "A";
		}	
	}
	
	for(int i = 1; i < n;i++){
		int h = press(ans + a + a + ans + a + b + ans + b + c);
		
		h -= ans.size();
		
		if(h == 0){
			ans += c;
		}
		if(h == 1){
			int j = press(ans + b + b);
			
			j -= ans.size();
			
			if(j == 0){
				ans += a + b;
			}
			if(j == 1){
				ans += b + a;
			}
			if(j == 2){
				ans += b + b;
			}
			i++;
		}
		if(h == 2){
			int j = press(ans + a + a);
			
			j -= ans.size();
			
			if(j == 0){
				ans += b + c;
			}
			if(j == 1){
				ans += a + b;
			}
			if(j == 2){
				ans += a + a;
			}
			i++;
		}
	}
	
	return ans;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cchfBXv2.o: in function `main':
grader.cpp:(.text.startup+0x4b): undefined reference to `guess_sequence[abi:cxx11](int)'
collect2: error: ld returned 1 exit status