Submission #887731

#	Time	Username	Problem	Language	Result	Execution time	Memory
887731		oblantis	Combo (IOI18_combo)	C++17	100 / 100	17 ms	1952 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
#define all(v) v.begin(), v.end()
#define pb push_back
#define ss second
#define ff first
#define vt vector
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<double, int> pdi;
const int inf = 1e9 + 10000;
const int mod = 1e9+7;
const int maxn = 5e5 + 12;
//int press(std::string p) {
  //if (++num_moves > MAX_NUM_MOVES) {
    //wrong_answer("too many moves");
  //}
  //int len = p.length();
  //if (len > 4 * N) {
    //wrong_answer("invalid press");
  //}
  //for (int i = 0; i < len; ++i) {
    //if (p[i] != 'A' && p[i] != 'B' && p[i] != 'X' && p[i] != 'Y') {
      //wrong_answer("invalid press");
    //}
  //}
  //int coins = 0;
  //for (int i = 0, j = 0; i < len; ++i) {
    //if (j < N && S[j] == p[i]) {
      //++j;
    //} else if (S[0] == p[i]) {
      //j = 1;
    //} else {
      //j = 0;
    //}
    //coins = std::max(coins, j);
  //}
  //return coins;
//}
string guess_sequence(int n){
	string s = "", a = "";
	int wt = press("AB");
	if(wt) {
		wt = press("A");
		if(wt)s = "A", a = "BXY";
		else s = "B", a = "AXY";
	}
	else {
		wt = press("X");
		if(wt)s = "X", a = "ABY";
		else s = "Y", a = "ABX";
	}
	if(n == 1)return s;
	for(int i = 1; i < n - 1; i++) {
		wt = press(s + a[0] + s + a[1] + a[0] + s + a[1] + a[1] + s + a[1] + a[2]);
		if(wt == i)s += a[2];
		else if(wt == i + 1)s += a[0];
		else if(wt == i + 2)s += a[1];
	}
	wt = press(s + a[0] + s + a[1]);
	if(wt == n){
		wt = press(s + a[0]);
		if(wt == n)s += a[0];
		else s += a[1];
	}
	else s += a[2];
	return s;
}

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