Submission #728417

#	Time	Username	Problem	Language	Result	Execution time	Memory
728417		MBI	Combo (IOI18_combo)	C++17	30 / 100	43 ms	584 KiB

combo

#include "combo.h"
// #include <iostream>

using namespace std;
string guess_sequence(int N) {
	int l=1,k;
	string p;
	if (press("A")){
		p="A";
		while (l<N){
			if ((k=press(p+"B"))>l){
				p+="B";
				l++;
			}
			else if ((k=press(p+"X"))>l){
				p+="X";
				l++;
			}
			else {
				p+="Y";
				l++;
			}
		}
	}
	else if (press("B")){
		p="B";
		while (l<N){
			if ((k=press(p+"A"))>l){
				p+="A";
				l++;
			}
			else if ((k=press(p+"X"))>l){
				p+="X";
				l++;
			}
			else {
				p+="Y";
				l++;
			}
		}
	}
	else if (press("X")){
		p="X";
		while (l<N){
			if ((k=press(p+"B"))>l){
				p+="B";
				l++;
			}
			else if ((k=press(p+"A"))>l){
				p+="A";
				l++;
			}
			else {
				p+="Y";
				l++;
			}
		}
	}
	else {
		p="Y";
		while (l<N){
			if ((k=press(p+"B"))>l){
				p+="B";
				l++;
			}
			else if ((k=press(p+"X"))>l){
				p+="X";
				l++;
			}
			else {
				p+="A";
				l++;
			}
		}
	}
	// cerr << p << " \n";
	return p;
}

• Subtask 1: 5 / 5
• Subtask 2: 25 / 95