oj.uz

답안 #946547

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
946547 2024-03-14T18:23:19 Z sondos225 아름다운 순열 (IZhO12_beauty) C++17
0 / 100
 3000 ms 164696 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
#define pb push_back
#define yes "YES"
#define no "NO"
#define bigg INT_MAX
#define debug(x) cout<<(#x)<<" = " <<x<<endl;
#define all(x) x.begin(),x.end()
#define sz size()
#define nn '\n'
#define mms(x,y) memset(x,y,sizeof(x))
#define forr(i,j,n) for (int i=j; i<n; i++)
#define forn(i,j,n) for (int i=j; i>n; i--)
#define fi first
#define se second
#define la "LA"
#define cinn(x,y) for(int i=0; i<y; i++) cin>>x[i];
#define pii pair<int,int>
map<int,int> m2;
map<int,int> m3;
int n;
int dp[20][(1<<20)];
int dfs(int x, int mask)
{
   if (mask==((1<<n)-1)) return 1;
   if (dp[x][mask]!=-1) return dp[x][mask];
   int c=0;
   forr(i,0,n)
   {
       if (m2[x]==m2[i] || m3[x]==m3[i]){
       if (!((1<<i)&mask))
       {
           mask|=(1<<i);
           c+=dfs(i,mask);
           mask^=(1<<i);
       }
       }
   }
   return dp[x][mask]=c;
}
signed main()
{
//    #ifndef LOCAL
//    freopen("lifeguards.in","r",stdin);
//    freopen("lifeguards.out","w", stdout);
//    #endif
    fast
   // int n;
    cin>>n;
    int a[n];
    mms(dp,-1);
    forr(i,0,n)
    {
        cin>>a[i];
        int x=a[i];
        while(x>0)
        {
            if (x%2==1) m2[i]++;
            x/=2;
        }
        x=a[i];
        while(x>0)
        {
            if (x%3==1) m3[i]++;
            x/=3;
        }
    }
    int ans=0;
    forr(i,0,n)
    {
        ans+=dfs(i,(1<<i));
    }
    cout<<ans;
    return 0;
}

Subtask #1
0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 164596 KB Output is correct
2 Correct 20 ms 164356 KB Output is correct
3 Correct 20 ms 164444 KB Output is correct
4 Correct 22 ms 164604 KB Output is correct
5 Correct 20 ms 164436 KB Output is correct
6 Correct 21 ms 164444 KB Output is correct
7 Correct 20 ms 164444 KB Output is correct
8 Correct 21 ms 164444 KB Output is correct
9 Correct 21 ms 164584 KB Output is correct
10 Correct 20 ms 164444 KB Output is correct
11 Correct 49 ms 164444 KB Output is correct
12 Correct 42 ms 164496 KB Output is correct
13 Correct 179 ms 164444 KB Output is correct
14 Correct 988 ms 164596 KB Output is correct
15 Correct 1135 ms 164592 KB Output is correct
16 Correct 863 ms 164604 KB Output is correct
17 Correct 1135 ms 164696 KB Output is correct
18 Correct 798 ms 164592 KB Output is correct
19 Execution timed out 3058 ms 164436 KB Time limit exceeded
20 Halted 0 ms 0 KB -