oj.uz

답안 #328825

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
328825 2020-11-18T07:03:10 Z gustason 아름다운 순열 (IZhO12_beauty) C++14
0 / 100
 3000 ms 364 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
pair<int, int> ones[21];
int n;
int ternary_ones(int x) {
    int s = 0;
    while(x > 0) {
        if (x % 3 == 1)
            s++;
        x /= 3;
    }
    return s;
}
 
ll cnt = 0;
void go(int id, bool used[], pair<int, int> last) {
    if (id == n) {
        cnt++;
        return;
    }
    for(int i = 0; i < n; i++) {
        if (used[i])
            continue;
        if (ones[i].first == last.first || ones[i].second == last.second) {
            used[i] = true;
            go(id + 1, used, ones[i]);
            used[i] = false;
        }
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    for(int i = 0; i < n; i++) {
        int x;
        cin >> x;
        ones[i].first = __builtin_popcount(x);
        ones[i].second = ternary_ones(x);
        //cout << x << " " << ones[i].first << " " << ones[i].second << "\n";
    }
//    for(int i = 0; i < n; i++) {
//        cout << ones[i].first << " " << ones[i].second;
//    }
    bool used[n];
    fill(used, used + n, false);
    for(int i = 0; i < n; i++) {
        used[i] = true;
        go(1, used, ones[i]);
        used[i] = false;
    }
 
    cout << cnt;
    return 0;
}

Subtask #1
0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 3 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 199 ms 364 KB Output is correct
9 Correct 2 ms 364 KB Output is correct
10 Correct 92 ms 364 KB Output is correct
11 Execution timed out 3079 ms 364 KB Time limit exceeded
12 Halted 0 ms 0 KB -