Submission #75727

#	Time	Username	Problem	Language	Result	Execution time	Memory
75727		Markomafko972	Combo (IOI18_combo)	C++14	100 / 100	66 ms	556 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
string guess_sequence(int N) {
	string sol = "";
	vector<char> v;
	if (press("AB") >= 1) {
		if (press("A") == 1) sol += 'A';
		else sol += 'B';
	}
	else {
		if (press("X") == 1) sol += 'X';
		else sol += 'Y';
	}
	
	if (N == 1) return sol;
	
	if (sol[0] != 'A') v.push_back('A');
	if (sol[0] != 'B') v.push_back('B');
	if (sol[0] != 'X') v.push_back('X');
	if (sol[0] != 'Y') v.push_back('Y');
	
	for (int i = 2; i < N; i ++) {
		string tren = "";
		for (int j = 0; j < v.size(); j ++) {
			tren += sol + v[0] + v[j];
		}
		tren += sol + v[1];
		
		int t = press(tren);
		if (t >= i+1) {
			sol += v[0];
		}
		else if (t == i) {
			sol += v[1];
		}
		else {
			sol += v[2];
		}
	}
	
	for (int i = 0; i < (int)v.size()-1; i ++) {
		if (press(sol + v[i]) == N) {
			return sol + v[i];
		}
	}
	
	return sol + v[ (int)v.size()-1 ];
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:25:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |   for (int j = 0; j < v.size(); j ++) {
      |                   ~~^~~~~~~~~~

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