모의고사 문제 1

function solution(month, day) 
{
    var lastday = [31,28,31,30,31,30,31,31,30,31,30,31, 31,28,31,30];
    day += 98;
    
    while (day > 31) 
    {
        day -= lastday[month-1];
        month += 1;
    }
    
    let result="";
    result = month%12 + "월 " + day + "일";
    
    return result;
}