Submission #36326

#	Time	Username	Problem	Language	Result	Execution time	Memory
36326		Kerim	Beautiful row (IZhO12_beauty)	C++14	0 / 100	26 ms	174048 KiB

beauty

#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N=21;
int two[N],three[N],n,dp[1<<N][N];
int rec(int mask,int last){
	if(mask==(1<<n)-1)
		return 1;
	int &ret=dp[mask][last];
	if(~ret)
		return ret;ret=0;
	for(int i=0;i<n;i++)	
		if(!(mask>>i&1)){
			if(last==n or (two[last]==two[i] or three[last]==three[i]))
				ret+=rec(mask|(1<<i),i);
		}
	return ret;	
}
int main(){
    //~ freopen("file.in", "r", stdin);
    scanf("%d",&n);
    for(int i=0;i<n;i++){
		int x;
		scanf("%d",&x);
		two[i]=__builtin_popcount(x);
		while(x>=1){
			three[i]+=(x%3==1);
			x/=3;
		}
	}
	memset(dp,-1,sizeof dp);
	printf("%d\n",rec(0,0));
	return 0;
}

Compilation message (stderr)

beauty.cpp: In function 'int main()':
beauty.cpp:37:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
beauty.cpp:40:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&x);
                 ^

• Subtask 1: 0 / 100