Code for Positive And- #include<bits/stdc++.h> using namespace std; #define ll long long int #define str string bool isPowerOfTwo(ll n) { if(n==0) return false; return (ceil(log2(n)) == floor(log2(n))); } int main() { ll t; cin>>t; while(t--) { ll n; cin>>n; if(n==1) { cout<<"1\n"; continue; } if(isPowerOfTwo(n)) cout<<"-1\n"; else { ll a[n+1]; for(int i=1;i<=n;i++) a[i]=i; a[1]=2,a[2]=3,a[3]=1; for(int i=4;i<=n;i++) { if(isPowerOfTwo(i)) { ...
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