제출 #1261530

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1261530		software1146	Machine (IOI24_machine)	C++17	100 / 100	44 ms	452 KiB

machine

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

using namespace std;

#define sz(x) (int)(x.size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define cmin(a, b) a = min(a, b)
#define cmax(a, b) a = max(a, b)

bool works(vector<int> &a, vector<int> &b, int x) {
    vector<int> c;
    for (auto u : b) {
        c.pb(x^u);
    }

    sort(all(c));
    return (a == c);
}

vector<bool> ok(256, 0);
vector<int> find_permutation(int n) {
    vector<int> a(n), p(n); iota(all(a), 1); a.back() += 2;
    vector<int> b = use_machine(a);
    int xr = 0;
    for (int x = 0; x < 256; x++) {
        if (works(a, b, x)) {
            xr = x; 
            break;
        }
    }

    for (int i = 0; i < n; i++) {
        p[i] = xr^b[i];
    }

    for (auto &u : p) u--;
    p[max_element(all(p)) - p.begin()] -= 2;
    return p;
}

• Subtask 0: 0 / 0
• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 19 / 19
• Subtask 4: 21 / 21
• Subtask 5: 10 / 10
• Subtask 6: 31 / 31