Submission #1144424

#	Time	Username	Problem	Language	Result	Execution time	Memory
1144424		crispxx	Combo (IOI18_combo)	C++20	10 / 100	10 ms	408 KiB

combo

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

// #include "grader.cpp"

using namespace std;

#define all(x) x.begin(), x.end()
#define nl '\n'

string guess_sequence(int n) {
	vector<char> F {'B', 'X', 'Y'};
	
	string p(n, 'A');
	
	int pf = 0;
	
	if(press(p)) {
		p = string(n, 'B');
		p[0] = 'A';
		pf = 1;
		F.erase(find(all(F), 'B'));
	}
	
	if(!pf) {
		for(int i = 0; i < 2; i++) {
			p[0] = F[i];
			int u = press(p);
			if(u) {
				p[0] = F[i];
				pf = u;
				F.erase(find(all(F), F[i]));
				break;
			}
		}
	}
	
	if(!pf) {
		p[0] = F[2];
		pf = 1;
		F.erase(find(all(F), F[2]));
	}
	
	pf = press(p);
		
	for(int i = 0; i < n; i++) {
		if(i < pf) continue;
		
		for(int j = 0; j < 2; j++) {
			p[i] = F[j];
			int u = press(p);
			if(u - pf > 0) {
				pf = u;
				break;
			}
		}
	}
	
	// cout << p << nl;
	
	return p;
}

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