Submission #173199

#	Time	Username	Problem	Language	Result	Execution time	Memory
173199		juggernaut	Beautiful row (IZhO12_beauty)	C++14	100 / 100	1660 ms	164500 KiB

beauty

//Just try and the idea will come!
#include<bits/stdc++.h>
#define int long long int
using namespace std;
int n,i,a[20],dp[1048576][20],ans,j,tri[20],bin[20],mask;
main(){
    scanf("%lld",&n);
    for(;i<n;i++){
        scanf("%lld",&a[i]);
        dp[1<<i][i]=1;
        bin[i]=__builtin_popcount(a[i]);
        mask=a[i];
        while(mask){
            if(mask%3==1)tri[i]++;
            mask/=3;
        }
    }
    for(mask=0;mask<(1<<n);mask++)
    for(i=0;i<n;i++)
    if(mask&(1<<i))
    for(j=0;j<n;j++)
    if(i!=j)
    if(mask&(1<<j)&&(tri[i]==tri[j]||bin[i]==bin[j]))dp[mask][i]+=dp[mask^(1<<i)][j];
    for(i=0;i<n;i++)ans+=dp[(1<<n)-1][i];
    printf("%lld",ans);
}

Compilation message (stderr)

beauty.cpp:6:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
beauty.cpp: In function 'int main()':
beauty.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ~~~~~^~~~~~~~~~~
beauty.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&a[i]);
         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 100 / 100