Submission #857594

#	Time	Username	Problem	Language	Result	Execution time	Memory
857594		TAhmed33	Beautiful row (IZhO12_beauty)	C++98	100 / 100	2292 ms	164572 KiB

beauty

#include <bits/stdc++.h>
#pragma GCC optimize ("Ofast")
#pragma GCC target ("popcnt")
using namespace std;
bool ok[20][20];
long long dp[20][1<<20];
int arr[20],n;
int get1(int x) {
int cnt=0;
  x=arr[x];
while (x){
cnt+=(x%3==1);
x/=3;
}
return cnt;
}
int get2(int x) {x=arr[x];
return __builtin_popcount(x);
}
long long ans (int pos, int mask) {
long long &ret=dp[pos][mask];
if (ret !=-1) return ret;
if(mask==0) return ret=1;
ret=0;
for (int j=0;j<n;j++){
if ((mask&(1<<j))&&ok[pos][j]) ret+=ans(j,mask^(1<<j));
}
return ret;
}
int main () {
memset(dp,-1,sizeof(dp));
cin>>n;
for(int i=0;i<n;i++)cin>>arr[i];
for(int i=0;i<n;i++)for(int j=i+1;j<n;j++){
if(get1(i)==get1(j)||get2(i)==get2(j)) {
ok[i][j]=ok[j][i]=1;
}
}
long long sum=0;
for(int i=0;i<n;i++)sum+=ans(i,(1<<n)-1-(1<<i));
cout<<sum;
}

• Subtask 1: 100 / 100