Submission #686916

#	Time	Username	Problem	Language	Result	Execution time	Memory
686916		viwlesxq	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
 
using namespace std;
 
typedef int64_t ll;
typedef string str;
 
#define pb push_back
#define pf push_front
#define ppb pop_back
#define ppf pop_front
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)x.size()
 
string guess_sequence(int N) {
	str res;
	vector <char> v;
	if (!press("X")) v.pb('X');
	else res += 'X';
	if (!press("Y")) v.pb('Y');
	else res += 'Y';
	if (!press("A")) v.pb('Y');
	else res += 'A';
	if (!press("B")) v.pb('B'); 
	else res += 'B';
	for (int i = 1; i < N; i++) {
		for (str ask : v) {
			if (press(res + ask) == i + 1) {
				res += ask;
				break;
			}
		}
	}
	return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:21:7: error: 'press' was not declared in this scope; did you mean 'res'?
   21 |  if (!press("X")) v.pb('X');
      |       ^~~~~
      |       res
combo.cpp:23:7: error: 'press' was not declared in this scope; did you mean 'res'?
   23 |  if (!press("Y")) v.pb('Y');
      |       ^~~~~
      |       res
combo.cpp:25:7: error: 'press' was not declared in this scope; did you mean 'res'?
   25 |  if (!press("A")) v.pb('Y');
      |       ^~~~~
      |       res
combo.cpp:27:7: error: 'press' was not declared in this scope; did you mean 'res'?
   27 |  if (!press("B")) v.pb('B');
      |       ^~~~~
      |       res
combo.cpp:30:18: error: conversion from 'char' to non-scalar type 'str' {aka 'std::__cxx11::basic_string<char>'} requested
   30 |   for (str ask : v) {
      |                  ^
combo.cpp:31:8: error: 'press' was not declared in this scope; did you mean 'res'?
   31 |    if (press(res + ask) == i + 1) {
      |        ^~~~~
      |        res