int d = Integer.parseInt(s); my program is giving errors in this line. calling it invalid format. import*; public class Solution { public static void main(String[] args) throws Exception { //write your code here BufferedReader r = new BufferedReader(new InputStreamReader(; String s = r.readLine(); int d = Integer.parseInt(s); if(d==1){ System.out.println("Monday"); } else if(d==2){ System.out.println("Tuesday"); } else if(d==3){ System.out.println("Wednesday"); } else if(d==4){ System.out.println("Thursday"); } else if(d==5){ System.out.println("Friday"); } else if(d==6){ System.out.println("Saturday"); } else if(d==7){ System.out.println("Sunday"); } else if((d<=0||d>=8)) { System.out.println("there is no such day of the week"); } } } what is wrong in this program please help