Longest Consecutive Duplicate String - Amazon Top Interview Questions


Problem Statement :


Given a lowercase alphabet string s, return the length of the longest substring with same characters.

Constraints

0 ≤ n ≤ 100,000 where n is the length of s
Example 1

Input

s = "abbbba"

Output
4


Explanation
The longest substring is "bbbb".

Example 2

Input
s = "aaabbb"
Output
3


Solution :



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                        Solution in C++ :

int solve(string s) {
    int max = 0;
    char curr = 0;
    int count = 0;
    for (int i = 0; i < s.size(); i++) {
        if (s[i] == curr) {
            count++;
        } else {
            if (count > max) max = count;

            curr = s[i];
            count = 1;
        }
    }

    return max > count ? max : count;
}
                    


                        Solution in Java :

import java.util.*;

class Solution {
    public int solve(String s) {
        if (s.length() < 1) {
            return 0;
        }
        int ans = 1, temp = 1;
        for (int i = 1; i < s.length(); i++) {
            if (s.charAt(i - 1) == s.charAt(i)) {
                temp++;
            } else {
                ans = Math.max(temp, ans);
                temp = 1;
            }
        }
        ans = Math.max(temp, ans);
        return ans;
    }
}
                    


                        Solution in Python : 
                            
class Solution:
    def solve(self, s):
        if not s:
            return 0
        tot = 1
        size = 1
        for ix in range(1, len(s)):
            if s[ix] == s[ix - 1]:
                size += 1
            else:
                tot = max(tot, size)
                size = 1
        tot = max(tot, size)
        return tot


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