Submission #75294

#	Time	Username	Problem	Language	Result	Execution time	Memory
75294		gs14004	Combo (IOI18_combo)	C++17	100 / 100	45 ms	616 KiB

combo

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

string guess_sequence(int N) {
	string p = "";
	if(press("AB") >= 1) p = press("A") ? "A" : "B";
	else p = press("X") ? "X" : "Y";
	vector<char> chr = {'A', 'B', 'X', 'Y'};
	chr.erase(find(chr.begin(), chr.end(), p[0]));
	while((int)p.size() <= N - 2){ 
		int query = press(p + chr[0] + chr[0] + p + chr[0] + chr[1] + p + chr[1] + chr[0]);
		if(query == p.size()){
			p.push_back(chr[2]);
		}
		else if(query == p.size() + 1){
			query = press(p + chr[1] + chr[2]);
			if(query == p.size()) p = p + chr[0] + chr[2];
			else if(query == p.size() + 1) p = p + chr[1] + chr[1];
			else p = p + chr[1] + chr[2];
		}
		else{
			query = press(p + chr[0] + chr[1]);
			if(query == p.size()) p = p + chr[1] + chr[0];
			else if(query == p.size() + 1) p = p + chr[0] + chr[0];
			else p = p + chr[0] + chr[1];
		}
	}
	while(p.size() != N){
		if(press(p + chr[0]) == p.size() + 1) p.push_back(chr[0]);
		else if(press(p + chr[1]) == p.size() + 1) p.push_back(chr[1]);
		else p.push_back(chr[2]);
	}
	return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:13:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |   if(query == p.size()){
      |      ~~~~~~^~~~~~~~~~~
combo.cpp:16:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |   else if(query == p.size() + 1){
      |           ~~~~~~^~~~~~~~~~~~~~~
combo.cpp:18:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |    if(query == p.size()) p = p + chr[0] + chr[2];
      |       ~~~~~~^~~~~~~~~~~
combo.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |    else if(query == p.size() + 1) p = p + chr[1] + chr[1];
      |            ~~~~~~^~~~~~~~~~~~~~~
combo.cpp:24:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |    if(query == p.size()) p = p + chr[1] + chr[0];
      |       ~~~~~~^~~~~~~~~~~
combo.cpp:25:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |    else if(query == p.size() + 1) p = p + chr[0] + chr[0];
      |            ~~~~~~^~~~~~~~~~~~~~~
combo.cpp:29:17: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   29 |  while(p.size() != N){
      |        ~~~~~~~~~^~~~
combo.cpp:30:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |   if(press(p + chr[0]) == p.size() + 1) p.push_back(chr[0]);
      |      ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
combo.cpp:31:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |   else if(press(p + chr[1]) == p.size() + 1) p.push_back(chr[1]);
      |           ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~

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