Submission #787193

#	Time	Username	Problem	Language	Result	Execution time	Memory
787193		resolve100	Combo (IOI18_combo)	C++14	0 / 100	1 ms	220 KiB

combo

#include<bits/stdc++.h>
#include "combo.h"
#define ll long long
#define ull unsigned ll
#define pb push_back
#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define read_file freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);


using namespace std;

string chars[] = {"A", "B", "X", "Y"};

string guess_sequence(int N){
	string out;

	if (N == 0) return out;
	int no;
	for (int i = 0; i < 3; i++){
		int num = press(chars[i]);
		if (num){
			out.append(chars[i]);
			no = i;
			break;
		}
	}
	if (out.size() == 0) {
		out.append(chars[3]);
		no = 3;
	}

	for (int i = 1; i < N; i++){
		if (no == 3){
			for (int i = 0; i < 2; i ++){

			}
			if (out.size() == i) out.append(chars[2]);
		}
		else{
			for (int j = 0; j < 3; j++){
				if (i == j) continue;
				int num = press(out+chars[i]);
				if (num == i+1){
					out.append(chars[i]);
					break;
				}
			}
			if (out.size() == i) out.append(chars[3]);
		}
	
	}
	return out;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:37:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   37 |    if (out.size() == i) out.append(chars[2]);
      |        ~~~~~~~~~~~^~~~
combo.cpp:48:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   48 |    if (out.size() == i) out.append(chars[3]);
      |        ~~~~~~~~~~~^~~~
combo.cpp:33:3: warning: 'no' may be used uninitialized in this function [-Wmaybe-uninitialized]
   33 |   if (no == 3){
      |   ^~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95