Submission #261478

#	Time	Username	Problem	Language	Result	Execution time	Memory
261478		Valera_Grinenko	Combo (IOI18_combo)	C++17	5 / 100	1 ms	212 KiB

combo

#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimization ("unroll-loops")
#include "combo.h"
#include <iostream>
#include <fstream>
#include <algorithm>
#include <vector>
#include <set>
#include <stack>
#include <map>
#include <iomanip>
#include <cmath>
#include <queue>
#include <bitset>
#include <numeric>
#include <array>
#include <cstring>
#include <random>
#include <chrono>
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define make_unique(x) sort(all((x))); (x).resize(unique(all((x))) - (x).begin())
typedef long long ll;
typedef long double ld;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
string guess_sequence(int n) {
  string ans;
  int x = 0;
  if(press("AB"))
    if(press("A")) ans = "A";
    else { ans = "B"; x = 1; }
  else
    if(press("X")) { ans = "X"; x = 2; }
    else { ans = "Y"; x = 3; }
  char ask[4] = {'A', 'B', 'X', 'Y'};
  swap(ask[3], ask[x]);
  for(int i = 1; i < n - 1; i++) {
    string query = ans + ask[0] + ans + ask[1] + ask[0] + ans + ask[1] + ask[1] + ans + ask[1] + ask[2];
    int c = press(query);
    if(c == i) ans += ask[2];
    else if(c == i + 1) ans += ask[0];
    else ans += ask[1];
  }
  if(press(ans + ask[0] + ans + ask[1]) == n)
    if(press(ans + ask[0]) == n) ans += ask[0];
    else ans += ask[1];
  else ans += ask[2];
  return ans;
}
/*

*/

Compilation message (stderr)

combo.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95