Submission #75842

#	Time	Username	Problem	Language	Result	Execution time	Memory
75842		nvmdava	Combo (IOI18_combo)	C++17	100 / 100	56 ms	520 KiB

combo

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

string s;
char c[4];

string guess_sequence(int N) {
	int k;
	if(press("AB")){
		if(press("A")){
			c[0] = 'B';
			c[1] = 'X';
			c[2] = 'Y';
			s = "A";
		} else {
			c[0] = 'A';
			c[1] = 'X';
			c[2] = 'Y';
			s = "B";
		}
	} else {
		if(press("X")){
			c[0] = 'B';
			c[1] = 'A';
			c[2] = 'Y';
			s = "X";
		} else {
			c[0] = 'B';
			c[1] = 'X';
			c[2] = 'A';
			s = "Y";
		}
	}
	if(N == 1) return s;
	for(int i = 2; i < N; i++){
		k = press(s + c[0]  + c[1] + s + c[0] + c[0] + s + c[0] + c[2] + s + c[1]); 
		if(k == i + 1){
			s += c[0];
		} else if(k == i){
			s += c[1];
		} else {
			s += c[2];
		}
	}
	if(press(s + c[0]) == N){
		s += c[0];
	} else {
		if(press(s + c[1]) == N){
			s += c[1];
		} else {
			s += c[2];
		}
	}
	return s;
}

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