Submission #685716

#	Time	Username	Problem	Language	Result	Execution time	Memory
685716		Summers	Beautiful row (IZhO12_beauty)	C++14	0 / 100	3068 ms	1748 KiB

beauty

#include<bits/stdc++.h>
#include<vector>
#define endl '\n'
using namespace std;
int a[1000000], b[1000000], dp[(1<<22)][23], n;

int rec(int mask, int last)
{
    if(mask==((1<<n)-1)) return 1;

    if(last!=-1 && dp[mask][last]!=0)return dp[mask][last];
    int an=0;
    for(int i=0;i<n;i++)
    {
        if((mask&(1<<i))==0)
        {
            if(last==-1 || (a[last]==a[i] || b[last]==b[i]))
            {
                an+=rec(mask|(1<<i), i);
            }
        }
    }
    return dp[mask][last]=an;
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int i,j,t,p,p1, ans=0;

    cin>>n;

    for(i=0;i<n;i++)
    {
        cin>>p;
        p1=p;
        while(p>0)
        {
            a[i]+=p%2;
            p/=2;

            if(p1%3==1)b[i]++;
            p1/=3;
        }

    }
    ans+=rec(0,-1);

    cout<<ans<<endl;


}

Compilation message (stderr)

beauty.cpp: In function 'int main()':
beauty.cpp:32:11: warning: unused variable 'j' [-Wunused-variable]
   32 |     int i,j,t,p,p1, ans=0;
      |           ^
beauty.cpp:32:13: warning: unused variable 't' [-Wunused-variable]
   32 |     int i,j,t,p,p1, ans=0;
      |             ^

• Subtask 1: 0 / 100