oj.uz

답안 #339110

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
339110 2020-12-24T15:52:30 Z fixikmila 아름다운 순열 (IZhO12_beauty) C++14
100 / 100
 777 ms 164544 KB 
#include <bits/stdc++.h>
using namespace std;
#define MOD 1000000007
typedef long long ll;
typedef pair<ll,ll>pll;
typedef long double ld;
ll bin_pow(ll a,ll b){
    if(b==0)return 1;
    if(b%2==0){
        ll t=bin_pow(a,b/2);
        return t*t%MOD;
    }
    else return a*bin_pow(a,b-1)%MOD;
}
vector<ll>graph[20];
bool tr(ll x,ll y){
    string s="",s1="";
    while(x){
        s+=x%3+'0';
        x/=3;
    }
    while(y){
        s1+=y%3+'0';
        y/=3;
    }
    x=y=0;
    for(auto u : s){
        if(u=='1')x++;
    }
    for(auto u : s1){
        if(u=='1')y++;
    }
    return x==y;
}
ll dp[1<<20][20];
int main()
{
    //freopen("b.in","r",stdin);
    //freopen("b.out","w",stdout);
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
    cin>>n;
    vector<ll>a(n);
    map<ll,ll>mp;
    for(int i=0;i<n;i++)cin>>a[i],mp[a[i]]=x,x++;
    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            if((__builtin_popcount(a[i])==__builtin_popcount(a[j]))||tr(a[i],a[j])){
                    //cout<<i<<" "<<j<<endl;
                graph[i].push_back(j);
                graph[j].push_back(i);
            }
        }
    }
    for(int i=1;i<(1<<n);i++){
        for(int j=0;j<n;j++){
            if((i&(1<<j))!=0){
                if(__builtin_popcount(i)==1)dp[i][j]=1;
                else{
                    for(auto z : graph[j]){
                        if((i&(1<<z))!=0){
                            dp[i][j]+=dp[(i^(1<<j))][z];
                        }
                    }
                }
            }
            else dp[i][j]=0;
        }
    }

    for(int i=0;i<n;i++){
        ans+=dp[(1<<n)-1][i];
    }
    cout<<ans;
    return 0;
}

Compilation message

beauty.cpp: In function 'int main()':
beauty.cpp:42:8: warning: unused variable 't' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |        ^
beauty.cpp:42:14: warning: unused variable 'm' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |              ^
beauty.cpp:42:16: warning: unused variable 'k' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                ^
beauty.cpp:42:20: warning: unused variable 'sum' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                    ^~~
beauty.cpp:42:26: warning: unused variable 'l' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                          ^
beauty.cpp:42:30: warning: unused variable 'r' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                              ^
beauty.cpp:42:38: warning: unused variable 'y' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                      ^
beauty.cpp:42:42: warning: unused variable 'z' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                          ^
beauty.cpp:42:52: warning: unused variable 'mn' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                                    ^~
beauty.cpp:42:65: warning: unused variable 'mx' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                                                 ^~

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 8 ms 2924 KB Output is correct
13 Correct 35 ms 10604 KB Output is correct
14 Correct 175 ms 41324 KB Output is correct
15 Correct 165 ms 41452 KB Output is correct
16 Correct 150 ms 41324 KB Output is correct
17 Correct 159 ms 41452 KB Output is correct
18 Correct 133 ms 41324 KB Output is correct
19 Correct 769 ms 164544 KB Output is correct
20 Correct 777 ms 164468 KB Output is correct