Submission #290563

#	Time	Username	Problem	Language	Result	Execution time	Memory
290563		gabrc52	Combo (IOI18_combo)	C++14	10 / 100	91 ms	452 KiB

combo

#include <iostream>
#include <string>
#define watch(x) cerr<<#x<<": "<<(x)<<endl
#include "combo.h"

using namespace std;

char getFirst() {
	if (press("AB") >= 1) {
		return press("A")==1 ? 'A' : 'B';
	} else {
		return press("X")==1 ? 'X' : 'Y';
	}
}

string valid = "ABXY";

string guess_sequence(int N) {
	string p,S;
	char first = getFirst();
	S.push_back(first);
	watch(first);
	for (int i=2; i<=N; i++) {
		for (char c : valid) {
			if (c != first) {
				if (press(S+c) == i) {
					S.push_back(c);
					break;
				}
			}
		}
	}
	watch(S);
	return S;
}

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