Find XOR Long challenge

I have a doubt in this and almost all other code chef problems. Like this in the Find XOR question:
“To ask a question, you should print a line containing two space-separated integers 1 and K, where …”
Do space-separated integers here mean a string like “1 k” or does it mean using cout<<1<<k?
As on other similar question when they ask to input 2 space-separated integers, the cin>>int1>>int2 works

anyone?

space separated means there should be a white space in between integers.

cout<<1<<k; //is wrong
cout<<1<<' '<<k<<endl;

practice here :https://atcoder.jp/contests/practice

cout<<1<<" "<<k