//Write a method to replace all spaces in a string with '%20'. You may assume that the string has sufficient space at the end to hold the additional characters,and that you are given the "true" length of the string. (Note: If implementing in Java,please use a character array so that you can perform this operation in place.)
import java.util.Scanner;
class Main {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
String str =s.nextLine();
Main m = new Main();
int length = str.length();
String result =m.urlify(str.trim().toCharArray(),length);
System.out.println(result);
}
public String urlify(char[] a,int length){
char[] result = new char[length];
int res_size = 0;
for(int i=0;i<a.length;i++){
if(a[i] == ' '){
result[res_size] = '%';
result[res_size+1] = '2';
result[res_size+2] = '0';
res_size+=3;
}else{
result[res_size]= a[i];
res_size+=1;
}
}
return new String(result);
}
}
