package InfinityJune21.String;

public class RemoveRepeatedStringCaseSensitive {

public static void main(String[] args) {

String originalString = "helloWOrld";

int length = originalString.length();

String answer = "";

int arr[] = new int[52];

for(int i = 0; i < length; i++) {

char ch = originalString.charAt(i);

int index;

if(ch >= 97 && ch <=122) {

index = ch - 97;

//a - 0, b - 1, c - 2, d - 3, ...., z - 25

}

else if(ch >= 65 && ch <= 90) {

index = (ch - 65) + 26;

//A - 26, B - 27, C - 28, D - 29, ...., Z - 51

}

else {

index = -1;

}

int frequency = arr[index];

if(frequency == 0) {

answer = answer + ch;

arr[index] = 1;

}

else {

arr[index] = frequency + 1;

}

}

System.out.println(answer);

}

}