Submission #338333

#	Time	Username	Problem	Language	Result	Execution time	Memory
338333		tengiz05	Beautiful row (IZhO12_beauty)	C++17	0 / 100	3064 ms	492 KiB

beauty

#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
template<class T> bool ckmin(T& a, const T& b) {return a>b? a=b, true:false;}
template<class T> bool ckmax(T& a, const T& b) {return a<b? a=b, true:false;}
const int mod = 1e9+7, N = 22;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val)-1;}
int a[N], n, m, k;
bool used[N];
vector<int> v;
bool iseq(int a, int b){
	if(__builtin_popcount(a) == __builtin_popcount(b))return true;
	int c1=0, c2=0;
	while(a>0){
		c1 += (a%3==1);
		a/=3;
	}
	while(b>0){
		c2 += (b%3==1);
		b/=3;
	}
	return c1 == c2;
}
bool is(){
	for(int i=1;i<n;i++){
		if(!iseq(v[i],v[i-1]))return false;
	}return true;
}
int ans = 0;
void doit(int i){
	if(i == n){
		if(is())ans++;
		return;
	}
	for(int j=0;j<n;j++){
		if(used[j])continue;
		used[j] = true;
		v.pb(a[j]);
		doit(i+1);
		used[j] = false;
		v.pop_back();
	}
}
void solve(int test_case){
	int i, j;
	cin >> n;
	for(i=0;i<n;i++){
		cin >> a[i];
	}
	iseq(5, 1);
	sort(a,a+n);
	doit(0);
	
	cout << ans << '\n';
	return;
}

signed main(){
	FASTIO;
#define MULTITEST 0
#if MULTITEST
	int _T;
	cin >> _T;
	for(int T_CASE = 1; T_CASE <= _T; T_CASE++)
		solve(T_CASE);
#else
	solve(1);
#endif
	return 0;
}

Compilation message (stderr)

beauty.cpp: In function 'void solve(int)':
beauty.cpp:53:9: warning: unused variable 'j' [-Wunused-variable]
   53 |  int i, j;
      |         ^

• Subtask 1: 0 / 100