Submission #141001

#	Time	Username	Problem	Language	Result	Execution time	Memory
141001		Shelby	Beautiful row (IZhO12_beauty)	C++11	0 / 100	40 ms	5496 KiB

beauty

#include <bits/stdc++.h>

using namespace std;

int dp[1<<20][20],t[20],b[20],a[20];
bool v[20][20];

int main()
{ int n,i,j,x,tmp,mask;
long long sol=0;
scanf("%d",&n);
for(i=0;i<n;i++)
{
    scanf("%d",&a[i]);

    b[i]=__builtin_popcount(a[i]);

    x=a[i];

    while(x>0)
    {
        tmp=x%3;

        if(tmp==1) t[i]++;

        x=x/3;
    }
}

for(i=0;i<n;i++)
{
    for(j=0;j<n;j++)
    {
        if((b[i]==b[j] || t[i]==t[j]) && (i!=j)) v[i][j]=true;
    }
}

for(i=0;i<n;i++) dp[(1<<i)][i]=1;


for(mask=1;mask<(1<<n);mask++)
{
    for(i=0;i<n;i++)
    {
        if(mask&(1<<i))
        {
            for(j=0;j<n;j++)
            {
                if( (mask&(1<<j))==0 && v[i][j]==true )
                {
                    dp[mask|(1<<j)][j]+=dp[mask][i];
                }
            }
        }
    }
}

for(i=0;i<n;i++) sol+=(long long)dp[(1<<n)-1][i];

printf("%lld\n",sol);

    return 0;
}

Compilation message (stderr)

beauty.cpp: In function 'int main()':
beauty.cpp:11:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d",&n);
 ~~~~~^~~~~~~~~
beauty.cpp:14:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&a[i]);
     ~~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 100