Submission #331275

#	Time	Username	Problem	Language	Result	Execution time	Memory
331275		pggp	Combo (IOI18_combo)	C++14	100 / 100	51 ms	600 KiB

combo

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

using namespace std;



int press(string t);
string s;



string guess_sequence(int N){
	string cur = "";
	string first = "";
	if(press("AB") > 0){
		if(press("A") == 1){
			cur = "A";
		}
		else{
			cur = "B";
		}
	}
	else{
		if(press("X") == 1){
			cur = "X";
		}
		else{
			cur = "Y";
		}
	}
	first = cur;

	if(N == 1){
		return cur;
	}

	for (int i = 0; i < N - 2; ++i)
	{
		if(first == "A"){
			int a = press(cur + "XY" + cur + "XX" + cur + "XB" + cur + "Y");
			//cout << a << endl;
			if(a == cur.size()){
				cur = cur + "B";
			}
			if(a == cur.size() + 1){
				cur = cur + "Y";
			}
			if(a == cur.size() + 2){
				cur = cur + "X";
			}
		}
		if(first == "B"){
			int a = press(cur + "XY" + cur + "XX" + cur + "XA" + cur + "Y");
			if(a == cur.size()){
				cur = cur + "A";
			}
			if(a == cur.size() + 1){
				cur = cur + "Y";
			}
			if(a == cur.size() + 2){
				cur = cur + "X";
			}
		}
		if(first == "X"){
			int a = press(cur + "AY" + cur + "AA" + cur + "AB" + cur + "Y");
			//cout << a <<endl;
			if(a == cur.size()){
				cur = cur + "B";
			}
			if(a == cur.size() + 1){
				cur = cur + "Y";
			}
			if(a == cur.size() + 2){
				cur = cur + "A";
			}
		}
		if(first == "Y"){
			int a = press(cur + "XA" + cur + "XX" + cur + "XB" + cur + "A");
			if(a == cur.size()){
				cur = cur + "B";
			}
			if(a == cur.size() + 1){
				cur = cur + "A";
			}
			if(a == cur.size() + 2){
				cur = cur + "X";
			}
		}
	}

	if(first == "A"){
		if(press(cur + "B") == N){
			cur = cur + "B";
		}
		else if(press(cur + "X") == N){
			cur = cur + "X";
		}
		else{
			cur = cur + "Y";
		}
	}
	else if(first == "B"){
		if(press(cur + "A") == N){
			cur = cur + "A";
		}
		else if(press(cur + "X") == N){
			cur = cur + "X";
		}
		else{
			cur = cur + "Y";
		}
	}
	else if(first == "X"){
		if(press(cur + "B") == N){
			cur = cur + "B";
		}
		else if(press(cur + "A") == N){
			cur = cur + "A";
		}
		else{
			cur = cur + "Y";
		}
	}
	else if(first == "Y"){
		if(press(cur + "B") == N){
			cur = cur + "B";
		}
		else if(press(cur + "X") == N){
			cur = cur + "X";
		}
		else{
			cur = cur + "A";
		}
	}

	return cur;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:43:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |    if(a == cur.size()){
      |       ~~^~~~~~~~~~~~~
combo.cpp:46:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |    if(a == cur.size() + 1){
      |       ~~^~~~~~~~~~~~~~~~~
combo.cpp:49:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |    if(a == cur.size() + 2){
      |       ~~^~~~~~~~~~~~~~~~~
combo.cpp:55:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |    if(a == cur.size()){
      |       ~~^~~~~~~~~~~~~
combo.cpp:58:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |    if(a == cur.size() + 1){
      |       ~~^~~~~~~~~~~~~~~~~
combo.cpp:61:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |    if(a == cur.size() + 2){
      |       ~~^~~~~~~~~~~~~~~~~
combo.cpp:68:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |    if(a == cur.size()){
      |       ~~^~~~~~~~~~~~~
combo.cpp:71:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |    if(a == cur.size() + 1){
      |       ~~^~~~~~~~~~~~~~~~~
combo.cpp:74:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |    if(a == cur.size() + 2){
      |       ~~^~~~~~~~~~~~~~~~~
combo.cpp:80:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   80 |    if(a == cur.size()){
      |       ~~^~~~~~~~~~~~~
combo.cpp:83:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |    if(a == cur.size() + 1){
      |       ~~^~~~~~~~~~~~~~~~~
combo.cpp:86:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |    if(a == cur.size() + 2){
      |       ~~^~~~~~~~~~~~~~~~~

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