Submission #339661

#	Time	Username	Problem	Language	Result	Execution time	Memory
339661		Ahmad_Hasan	Beautiful row (IZhO12_beauty)	C++17	0 / 100	1 ms	492 KiB

beauty

#include <bits/stdc++.h>
#define int long long
using namespace std;

int n;
vector<int> nums;
int cnt=0ll;
vector<vector<int> > dp;
vector<int>b2,b3;
int slv(int msk=0,int lstidx=-1){

    if(msk==(1ll<<n)-1ll){
        return 1ll;
    }
    int cnt=0;
    if(lstidx!=-1&&dp[msk][lstidx]!=-1)
        return dp[msk][lstidx];
    for(int i=0;i<n;i++){
        if(!(msk&(1<<i))){
            if(lstidx==-1){
                cnt+=slv(msk|(1ll<<i),i);
                continue;
            }
            int f=(b2[i]==b2[lstidx])||(b3[i]==b3[lstidx]);

            if(f){
                cnt+=slv(msk|(1ll<<i),i);
            }
        }
    }
    return dp[msk][lstidx]=cnt;
}


int32_t main()
{
    /**ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);*/
    cin>>n;
    nums=vector<int>(n);
    for(int i=0;i<n;i++){
        cin>>nums[i];
    }

    dp=vector<vector<int> >((1<<n),vector<int>(n,-1ll));
    b2=b3=vector<int>(n);
    for(int i=0;i<n;i++){
        int cntb2=0;
        int num1=nums[i];
        while(num1){
            cntb2+=num1%2ll;
            num1/=2ll;
        }
        b2[i]=cntb2;
        int cntb3=0;
        num1=nums[i];
        while(num1){
            cntb3+=(num1%3ll==1ll);
            num1/=3ll;
        }
        b3[i]=cntb3;
    }
    for(int i=(1<<n)-1;i>=1;i--){
        for(int j=n-1;j>=0;j--){
            if(i&(1<<j))
                slv(i,j);
        }
    }
    for(int i=0;i<n;i++)
        slv((1<<i),i);
    cout<<(long long)slv();


    return 0;
}
/****

1
8 4
3 1
4 3
1 8
8 7

1
100 9
1 100
2 1
3 2
4 3
5 4
100 99
99 98
98 97
97 96



19 3 6
3 12 9


2000000000 1000000000 1000000000
3 1000000000 1000000000

17
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
1 1

*/

• Subtask 1: 0 / 100