Submission #123057

#	Time	Username	Problem	Language	Result	Execution time	Memory
123057		khulegub	Combo (IOI18_combo)	C++14	0 / 100	1 ms	200 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>

using namespace std;
string butt[] = {"A", "B", "X", "Y"};

string guess_sequence(int n) {
	int f;
	string s = "";
	if(press("A")) f = 0;
	else if(press("B")) f = 1;
	else if(press("X")) f = 2;
	else f = 3;
	s = butt[f];
	string asky = s + butt[(f + 1) % 4];
	asky += s + butt[(f + 2) % 4] + butt[(f + 1) % 4];
	asky += s + butt[(f + 2) % 4] + butt[(f + 2) % 4];
	asky += s + butt[(f + 2) % 4] + butt[(f + 3) % 4];
	for (int i = 1; i < n - 1; i++){
		int x = press(asky);
		int nxt;
		if (x == s.length() + 1) nxt = (f + 1) % 4;
		else if (x == s.length() + 2) nxt = (f + 2) % 4;
		else if (x == s.length() ) nxt = (f + 3) % 4;
		s += butt[nxt];
	}
	if(press(s + "A")) return s + "A";
	if(press(s + "B")) return s + "B";
	if(press(s + "X")) return s + "X";
	return s + "Y";
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:22:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |   if (x == s.length() + 1) nxt = (f + 1) % 4;
      |       ~~^~~~~~~~~~~~~~~~~
combo.cpp:23:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |   else if (x == s.length() + 2) nxt = (f + 2) % 4;
      |            ~~^~~~~~~~~~~~~~~~~
combo.cpp:24:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |   else if (x == s.length() ) nxt = (f + 3) % 4;
      |            ~~^~~~~~~~~~~~~

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