Submission #548102

#	Time	Username	Problem	Language	Result	Execution time	Memory
548102		Deepesson	Beautiful row (IZhO12_beauty)	C++17	0 / 100	0 ms	212 KiB

beauty

#include <bits/stdc++.h>
#define MAX 1100000
using ll = long long;
ll getval(ll x,ll t){
    ll ans=0;
    while(x){
        ll p = x%t;
        if(p==1)++ans;
        x/=t;
    }
    return ans;
}
long long ind[21][2];
bool existe[MAX][20];
ll tab[MAX][20];
ll obj=0;
int N;
ll dp(ll pente,int pos){
    if(pente==obj)return 1;
    if(existe[pente][pos])return tab[pente][pos];
    existe[pente][pos]=true;
    ll tot=0;
    for(int i=0;i!=N;++i){
        if(pente&(1<<i))continue;
        if(ind[pos][0]==ind[i][0]||ind[pos][0]==ind[i][1]||
           ind[pos][1]==ind[i][0]||ind[pos][1]==ind[i][1]){
                tot+=dp(pente+(1<<i),i);
           }
    }
    return tab[pente][pos]=tot;
}
int main()
{
    std::cin>>N;
    obj=(1<<N)-1;
    for(int i=0;i!=N;++i){
        ll x;std::cin>>x;
        ind[i][0]=getval(x,2);
        ind[i][1]=getval(x,3);
    }
    ll ans=0;
    for(int i=0;i!=N;++i){
        ans+=dp(1<<i,i);
    }
    std::cout<<ans<<"\n";
}

• Subtask 1: 0 / 100