百度编程题[倒计时+字典序]

function addZero(value){
    if(value>=10){
        return value;
    }
    return '0'+value;
}

function second( second_time ){
    var data = {
        second : 0, 
        min : 0, 
        hour : 0,
        day : 0
    };
    data.second = parseInt(second_time);
    if( parseInt(second_time )>= 60){
        var second = parseInt(second_time) % 60;
        var min = parseInt(second_time / 60);
        data.second = second;  data.min = min;
        if( min >= 60 ){  min = parseInt(second_time / 60) % 60;
            var hour = parseInt( parseInt(second_time / 60) /60 );
            data.min = min;
            data.hour = hour;
             if( hour >= 24 ){
                hour = parseInt( parseInt(second_time / 60) /60 ) % 24;
                var day = parseInt( parseInt( parseInt(second_time / 60) /60 ) / 24 );
                data.hour = hour;  data.day = day;  }
        }
    }
    return data;
}  


function render(data){
    var ele = document.getElementById('jsCountdown');
    if(data.day){
        ele.children[0] = addZero(data.day)+'天';  }else{
        ele.children[0].className = 'hide';
    }
    ele.children[1] = addZero(data.hour)+':';
    ele.children[2] = addZero(data.min) + ':';
    ele.children[3] = addZero(data.second);
}

var firstStr=readline();

var secondStr=readline();

var firstArr=firstStr.split('');
var secondArr=secondStr.split('');

secondArr.sort();
secondArr.reverse();
for(var i=0;i<secondArr.length;i++){
    for(var x=0;x<firstArr.length;x++){
        if(secondArr[i]>firstArr[x]){
            firstArr[x]=secondArr[i];
            secondArr.splice(i,1);
        }
    }
}

print (firstArr.join(''));