Submission #366210

#	Time	Username	Problem	Language	Result	Execution time	Memory
366210		algorithm16	Combo (IOI18_combo)	C++14	100 / 100	56 ms	616 KiB

combo

#include<iostream>
#include<string>
#include<algorithm>
#include "combo.h"
using namespace std;
/*int press(string s) {
	cout << s << "\n";
	int a;
	cin >> a;
	return a;
}*/
string guess_sequence(int N) {
	if(N==1) {
		if(press("A")) return "A";
		else if(press("B")) return "B";
		else if(press("X")) return "X";
		return "Y";
	}
	string s="";
	int x=0;
	/*x=press("AABABBBXBY");
	if(x==1) s+="A";
	else if(x==2) s+="B";
	else {
		x=press("XXYAYBYXYY");
		if(x==1) s+="X";
		else if(x==2) s+="Y";
	}*/
	x=press("AB");
	if(x) {
		if(press("A")) s+="A";
		else s+="B";
	}
	else {
		if(press("X")) s+="X";
		else s+="Y";
	}
	for(int i=1;i<N-1;i++) {
		string s2="";
		if(s[0]=='A') s2=s+"B"+s+"XB"+s+"XX"+s+"XY";
		if(s[0]=='B') s2=s+"A"+s+"XA"+s+"XX"+s+"XY";
		if(s[0]=='X') s2=s+"A"+s+"BA"+s+"BB"+s+"BY";
		if(s[0]=='Y') s2=s+"A"+s+"BA"+s+"BB"+s+"BX";
		int x=press(s2);
		if(x==s.size()+1) {
			if(s[0]=='A') s+="B";
			else s+="A";
			continue;
		}
		else if(x==s.size()+2) {
			if(s[0]=='A' or s[0]=='B') s+="X";
			else s+="B";
		}
		else {
			if(s[0]=='Y') s+="X";
			else s+="Y";
		}
	}
	if(s[0]=='A') {
		if(press(s+"B")==N) return s+"B";
		if(press(s+"X")==N) return s+"X";
		return s+"Y";
	}
	if(s[0]=='B') {
		if(press(s+"A")==N) return s+"A";
		if(press(s+"X")==N) return s+"X";
		return s+"Y";
	}
	if(s[0]=='X') {
		if(press(s+"A")==N) return s+"A";
		if(press(s+"B")==N) return s+"B";
		return s+"Y";
	}
	if(s[0]=='Y') {
		if(press(s+"A")==N) return s+"A";
		if(press(s+"B")==N) return s+"B";
		return s+"X";
	}
}
/*int main()
{
	int n;
	cin >> n;
	cout << guess_sequence(n);
	return 0;
}*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:45:7: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   if(x==s.size()+1) {
      |      ~^~~~~~~~~~~~
combo.cpp:50:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |   else if(x==s.size()+2) {
      |           ~^~~~~~~~~~~~
combo.cpp:19:11: warning: control reaches end of non-void function [-Wreturn-type]
   19 |  string s="";
      |           ^~

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