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답안 #339843

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
339843 2020-12-26T09:43:48 Z nandonathaniel 아름다운 순열 (IZhO12_beauty) C++14
100 / 100
 859 ms 164460 KB 
#include<bits/stdc++.h>
using namespace std;
const int MAXN=20;

int n;
long long dp[1<<MAXN][MAXN];
int a[MAXN],binary[MAXN],ternary[MAXN];;

int basetwo(int x){
	return __builtin_popcount(x);
}

int basethree(int x){
	int ret=0;
	while(x>0){
		if(x%3==1)ret++;
		x/=3;
	}
	return ret;
}

int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n;
	for(int i=0;i<n;i++){
		cin >> a[i];
		dp[1<<i][i]=1;
		binary[i]=basetwo(a[i]);
		ternary[i]=basethree(a[i]);
	}
	for(int i=1;i<(1<<n);i++){
		for(int j=0;j<n;j++){
			if((1<<j) & i){
				for(int k=0;k<n;k++){
					if(!((1<<k) & i)){
						if(binary[k]==binary[j] || ternary[k]==ternary[j])dp[i+(1<<k)][k]+=dp[i][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 640 KB Output is correct
11 Correct 10 ms 2924 KB Output is correct
12 Correct 9 ms 2924 KB Output is correct
13 Correct 38 ms 10732 KB Output is correct
14 Correct 178 ms 41324 KB Output is correct
15 Correct 170 ms 41452 KB Output is correct
16 Correct 181 ms 41452 KB Output is correct
17 Correct 189 ms 41324 KB Output is correct
18 Correct 193 ms 41324 KB Output is correct
19 Correct 859 ms 164460 KB Output is correct
20 Correct 722 ms 164460 KB Output is correct