// your code goes herelet y="";for(let x=15; x<50; x++){y+=x%2 + "\n"};console.log(y)
Standard input is empty
1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
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