#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; int a[n+1],*p=a; for(int i = 1;i <= n;i++) { cin >>a[i]; } for(p = a+1;p <= a+n;p++) { if(*p%2==0){ cout<<*p-1<<" "; } else{ cout<<*p+1<<" "; } } }