Submission #568472

#	Time	Username	Problem	Language	Result	Execution time	Memory
568472		ngpin04	Combo (IOI18_combo)	C++17	100 / 100	32 ms	648 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define mp make_pair
#define TASK ""
#define bit(x) (1LL << (x))
#define getbit(x, i) (((x) >> (i)) & 1)
#define ALL(x) (x).begin(), (x).end() 
using namespace std;
template <typename T1, typename T2> bool mini(T1 &a, T2 b) {
  if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maxi(T1 &a, T2 b) {
  if (a < b) {a = b; return true;} return false;
}
mt19937_64 rd(chrono::steady_clock::now().time_since_epoch().count());

int rand(int l, int r) {
  return l + rd() % (r - l + 1);
}
// const int N = 1e5 + 5; 
const int oo = 1e9;
const long long ooo = 1e18;
const int mod = 1e9 + 7; // 998244353;
const long double pi = acos(-1);

#define ask press

string guess_sequence(int N) {
    string a = "A", b = "B", x = "X", y = "Y";
    if (ask(a + b)) {
        if (ask(b))
            swap(a, b);
    } else {
        if (ask(x))
            swap(a, x);
        else
            swap(a, y);
    }
    string s;
    s += a;

    for (int i = 1; i + 1 < N; i++) {
        string str = s + b + s + x + b + s + x + x + s + x + y;
        // cerr << str << "\n";
        int res = ask(str);
        if (res == i)
            s += y;
        else if (res == i + 1)
            s += b;
        else
            s += x;
    }

    if (N > 1) {
        if (ask(s + b) == N)
            s += b;
        else if (ask(s + x) == N)
            s += x;
        else
            s += y;
    }

    return s;
}

//#include "grader.cpp"

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