oj.uz

답안 #382228

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
382228 2021-03-26T19:02:13 Z saarang123 아름다운 순열 (IZhO12_beauty) C++17
100 / 100
 738 ms 164588 KB 
#include <bits/stdc++.h>
using namespace std;
const int mxn = 20;
long long dp[1 << mxn][mxn];
int a[mxn], bin[mxn], ter[mxn];
signed main() {
    std::ios::sync_with_stdio(0);
    std::cout.tie(0);
    std::cin.tie(0);
    #ifdef saarang
    freopen("/home/saarang/Documents/cp/input.txt", "r", stdin);
    freopen("/home/saarang/Documents/cp/output.txt", "w", stdout);
    #endif
    int n; cin >> n;
    for(int i = 0; i < n; i++) {
    	cin >> a[i];
    	int c = 0;
    	for(int j = 0; j < 31; j++)
    		c += (a[i] >> j & 1);
    	bin[i] = c;
    	int f = 0, x = a[i];
    	while(x) {
    		f += (x % 3 == 1);
    		x /= 3;
    	}
    	ter[i] = f;
    }
    for(int i = 0; i < n; i++)
    	dp[1 << i][i] = 1;
    for(int mask = 1; mask < (1 << n); mask++) {
    	for(int i = 0; i < n; i++) if(!(mask >> i & 1)) {
    		for(int j = 0; j < n; j++) if(mask >> j & 1)
    			if(bin[i] == bin[j] || ter[i] == ter[j])
    				dp[mask ^ (1 << i)][i] += dp[mask][j];
    	}
    }
    long long ans = 0;
    for(int i = 0; i < n; i++)
    	ans += dp[(1 << n) - 1][i];
    cout << ans << '\n';
    return 0;
}

Subtask #1
100.0 / 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 1 ms 492 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 8 ms 2924 KB Output is correct
12 Correct 7 ms 2924 KB Output is correct
13 Correct 31 ms 10604 KB Output is correct
14 Correct 153 ms 41324 KB Output is correct
15 Correct 134 ms 41452 KB Output is correct
16 Correct 162 ms 41324 KB Output is correct
17 Correct 175 ms 41452 KB Output is correct
18 Correct 170 ms 41452 KB Output is correct
19 Correct 738 ms 164460 KB Output is correct
20 Correct 630 ms 164588 KB Output is correct