Submission #390295

#	Time	Username	Problem	Language	Result	Execution time	Memory
390295		Marceantasy	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

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

#define ll long long
#define ar array

const int mxN = 2e5, M = 1e9+7; 
int N; 

string guess_sequence(int N){
    string sequence = ""; 
    string chars = "ABXY";
    if(press("AB")){
        if(press("A")){
            sequence+="A"; 
            chars.erase(chars.find("A"), 1); 
        }else{
            sequence+="B";
            chars.erase(chars.find("B"), 1); 
        }
    }else{
        if(press("X")){
            sequence+="X"; 
            chars.erase(chars.find("X"), 1); 
        }else{
            sequence+="Y";
            chars.erase(chars.find("Y"), 1); 
        }
    }
    int val = 1; 
    for(int i = 1; i<N; ++i){
        int points = press(sequence+chars[0]+sequence+chars[1]+chars[0]+sequence+chars[1]+chars[1]+sequence+chars[1]+chars[2]);
        if(points == i){
            sequence+=chars[2]; 
        }else if(points == i+1){
            sequence+=chars[0]; 
        }else{
            sequence+=chars[1]; 
        }
        val++; 
    }
    if(press(sequence+chars[0]+sequence+chars[1]) == val+1){
        if(press(sequence+chars[0])){
            sequence+=chars[0]; 
        }else{
            sequence+=chars[1]; 
        }
    }else{
        sequence+=chars[2]; 
    }
    return sequence; 
}

int press(string s){
    ;
}

int main(){
    cin >> N;   
    guess_sequence(N); 
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:13:8: error: 'press' was not declared in this scope
   13 |     if(press("AB")){
      |        ^~~~~
combo.cpp:32:22: error: 'press' was not declared in this scope
   32 |         int points = press(sequence+chars[0]+sequence+chars[1]+chars[0]+sequence+chars[1]+chars[1]+sequence+chars[1]+chars[2]);
      |                      ^~~~~
combo.cpp:42:8: error: 'press' was not declared in this scope
   42 |     if(press(sequence+chars[0]+sequence+chars[1]) == val+1){
      |        ^~~~~
combo.cpp: In function 'int press(std::string)':
combo.cpp:56:1: warning: no return statement in function returning non-void [-Wreturn-type]
   56 | }
      | ^