here is the code,I know it is the first and the most primary solution, but why
it fails (passes first two sets and fails on third)?
######## The Code ##########
const readline = require('readline');
var rl = readline.createInterface(process.stdin, process.stdout);
var TCNum=0;
var TCmax=null;
var waitFor='T';
rl.on('line', function(data) {
if(waitFor=='T'){
TCmax=parseInt(data);
waitFor='N';
}else if(waitFor=='N'){
var N=data;
var a='';
for(var i=0;i<N.length;i++)
{
if(N.substr(i,1)=='4')
{
a+='2';
}else{
a+='0';
}
}
console.log("Case #"+(TCNum+1)+": "+(parseInt(a)).toString()+'
'+(parseInt(N)-parseInt(a)).toString());
checkCount();
}
function checkCount()
{
TCNum++;
if(TCNum==TCmax)
{
rl.close();
}
}
}).on('close',function(){
process.exit(0);
});
###########################
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