PROBLEM DESCRIPTION
Given a string A and integer B, remove all consecutive same characters that have length exactly B.
NOTE : All the consecutive same characters that have length exactly B will be removed simultaneously.
SOLUTION
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public class Solution {
public String solve(String A, int B) {
int n = A.length();
// Counter to keep track of consecutive characters
int currentCount = 0;
// Previous character initialized with a non-alphanumeric character
char prev = '#';
// StringBuffer to store the result
StringBuffer res = new StringBuffer();
// StringBuffer to store consecutive characters temporarily
StringBuffer temp = new StringBuffer();
for(int i = 0; i < n; i++){
// Current character in the iteration
char ch = A.charAt(i);
// If the current character is the same as the previous character
if(ch == prev){
// Append the character to the temporary StringBuffer
temp.append(ch + "");
// Increase the count of consecutive characters
currentCount++;
}else{ // If the current character is different from the previous character
// If there were consecutive characters and their count is not exactly B
if(currentCount != B){
// Append the consecutive characters stored in temp to the result
res.append(temp);
}
// Reset the temporary StringBuffer with the current character
temp = new StringBuffer(ch + "");
// Update the previous character to the current character
prev = ch;
// Reset the count of consecutive characters to 1
currentCount = 1;
}
}
// If there were consecutive characters at the end and their count is not exactly B
if(currentCount > 0 && currentCount != B){
// Append the consecutive characters stored in temp to the result
res.append(temp);
}
// Convert the StringBuffer result to a String and return
return res.toString();
}
}