hackerrank_timeconversion.js

process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function main() {
    var time = readLine();
    //console.log(typeof time);
    //PM,AM 인지 확인
    //이후 +시간
    //출력순서 뒤집기
    var status = time.slice(time.length-2, time.length);
    var newTime;
    
    if(status=="PM"){
      var hour = parseInt(time.slice(0,2));
      if(hour===12){
        var hourString = hour.toString();
      }
      else{
      var hourTemp = hour+12;
      var hourString = hourTemp.toString();
      }
      newTime = hourString
    }
    else if(status=="AM"){
      newTime = time.slice(0,2);
      if(newTime==="12") newTime = "00"; 
    }
    //console.log(time.slice(0,2));
    for(i=2;i<8;i++){
        newTime = newTime+time[i];
    }
    console.log(newTime);
}