Submission #601630

#	Time	Username	Problem	Language	Result	Execution time	Memory
601630		idiot123	Combo (IOI18_combo)	C++14	100 / 100	41 ms	440 KiB

combo

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

using namespace std;

string guess_sequence(int N) {
	string ans;
	if(press("AB") >= 1){
		if(press("A") == 1){
			ans = "A";
		}else{
			ans = "B";
		}
	}else{
		if(press("X") == 1){
			ans = "X";
		}else{
			ans = "Y";
		}
	}
	if(N == 1)return ans;
	vector<string> letters;
	if(ans != "A")letters.push_back("A");
	if(ans != "B")letters.push_back("B");
	if(ans != "X")letters.push_back("X");
	if(ans != "Y")letters.push_back("Y");
	string a = ans + letters[0]; string b = ans + letters[1]; string c = ans + letters[2];
	for(int i = 2; i < N; i++){
		int x = press(a + letters[0] + a + letters[1] + b + letters[0]);
		if(x < i){
			a = c; b = c;
			a += letters[0]; b += letters[1]; c += letters[2];
		}else if(x == i){
			c = b;
			a += letters[2]; b += letters[1]; c += letters[2];
		}else{
			c = b; b = a;
			a += letters[0]; b += letters[1]; c += letters[0];
		}
	}
	if(press(a) == N){
		//cout<<a<<"\n";
		return a;
	}else if(press(b) == N){
		//cout<<b<<"\n";
		return b;
	}else{
		//cout<<c<<"\n";
		return c;
	}
}

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