Submission #939345

#	Time	Username	Problem	Language	Result	Execution time	Memory
939345		xynex	Combo (IOI18_combo)	C++17	5 / 100	1 ms	596 KiB

combo

/**
  * Author: Tenjin
  * Created: 27.04.2022 18:58
  * Why am I so stupid? :c
  * Slishkom slab
**/
#include "combo.h"
#include <bits/stdc++.h>

 #pragma GCC optimize("inline")
 #pragma GCC optimize("-fgcse,-fgcse-lm")
 #pragma GCC optimize("-ftree-pre,-ftree-vrp")
 #pragma GCC optimize("-ffast-math")
 #pragma GCC optimize("-fipa-sra")
 #pragma GCC optimize("-fpeephole2")
 #pragma GCC optimize("-fsched-spec")
 #pragma GCC optimize("Ofast,no-stack-protector")
 #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
 #pragma GCC optimize("unroll-loops")

using namespace std;

#define ll long long
#define pr pair
#define vt vector
#define ff first
#define ss second
#define sz(a) (int)a.size()
#define pb push_back
#define pf push_front
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()

template<typename T> T get_rand(T l, T r) {
  random_device rd;
  mt19937 gen(rd());
  return uniform_int_distribution<T>(l, r)(gen);
}

template<class A> void read(vt<A>& v);
template<class A, size_t S> void read(array<A, S>& a);
template<class T> void read(T& x) { cin >> x; }
void read(double& d) { string t; read(t); d = stod(t); }
void read(long double& d) { string t; read(t); d = stold(t); }
template<class H, class... T> void read(H& h, T&... t) { read(h); read(t...); }
template<class A> void read(vt<A>& x) { for (auto& a : x) read(a); }
template<class A, size_t S> void read(array<A, S>& x) { for (auto& a : x) read(a); }

string to_string(char c) { return string(1, c); }
string to_string(bool b) { return b ? "true" : "false"; }
string to_string(const char* s) { return string(s); }
string to_string(string s) { return s; }
string to_string(vt<bool> v) { string res; for (int i = 0; i < sz(v); ++i) res += char('0' + v[i]); return res; }
template<size_t S> string to_string(bitset<S> b) { string res; for (int i = 0; i < S; ++i) res += char('0' + b[i]); return res; }
template<class T> string to_string(T v) { bool f = 1; string res; for (auto x : v) { if (!f) res += ' '; f = 0; res += to_string(x); } return res; }

template<class A> void write(A x) { cout << to_string(x); }
template<class H, class... T> void write(const H& h, const T&... t) { write(h); write(t...); }

void print() { write("\n"); }
template<class H, class... T> void print(const H& h, const T&... t) { write(h); if (sizeof...(t)) write(' '); print(t...); }

void freop(string s) {
  freopen((s + ".in").c_str(), "r", stdin);
  freopen((s + ".out").c_str(), "w", stdout);
}

const int MOD = 1e9 + 7;
const ll INF = 1e14;
const int M = 4e5 + 5;
const double long pi = acos(-1);
const double long eps = 1e-12;
const int sq = 700;

int dx[] = {-1, 0, 1, 0};
int dy[] = {0, -1, 0, 1};
/* ll vs int*/

//const int N = 1e6 + 5;

std::string guess_sequence(int N) {
  char x, y, z;
  string ans = "";
  if(press("AB")) {
    if(press("A")) ans += "A", x = 'B', y = 'X', z = 'Y';
    else ans += "B", x = 'A', y = 'X', z = 'Y';
  }
  else {
    if(press("X")) ans += "X", x = 'A', y = 'B', z = 'Y';
    else ans += "Y", x = 'A', y = 'B', z = 'X';
  }
  for(int i = 2; i <= N - 1; ++i) {
    int cur = press(ans + x + ans + y + x + ans + y + y + ans + y + z);
    if(cur == i) {
      ans += x;
    }
    else if(cur == i + 1) {
      ans += y;
    }
    else {
      ans += z;
    }
  }
  if(press(ans + x) == N) {
    ans += x;
  }
  else if(press(ans + y) == N) {
    ans += y;
  }
  else ans += z;
 // print(ans, num_moves);
  return ans;
}

Compilation message (stderr)

combo.cpp: In function 'void freop(std::string)':
combo.cpp:64:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |   freopen((s + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
combo.cpp:65:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |   freopen((s + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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