Given a string, find minimum number of deletions required so that there will be no two consecutive repeating characters in the string.
Examples:
Input : AAABBB Output : 4 Explanation : New string should be AB Input : ABABABAB Output : 0 Explanation : There are no consecutive repeating characters.
If there are n consecutive same characters delete n-1 out of those n characters.
C++
// CPP code to count minimum deletions required // so that there are no consecutive characters left #include <bits/stdc++.h> using namespace std; int countDeletions(string str) { int ans = 0; for (int i = 0; i < str.length() - 1; i++) // If two consecutive characters are // the same, delete one of them. if (str[i] == str[i + 1]) ans++; return ans; } // Driver code int main() { string str = "AAABBB"; // Function call to print answer cout << countDeletions(str); return 0; } |
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Java
// Java code to count minimum deletions required // so that there are no consecutive characters left import java.util.*; class GFG { static int countDeletions(String s) { int ans = 0; char[] str = s.toCharArray(); for (int i = 0; i < str.length - 1; i++) // If two consecutive characters are // the same, delete one of them. if (str[i] == str[i + 1]) ans++; return ans; } // Driver code public static void main(String[] args) { String str = "AAABBB"; // Function call to print answer System.out.println(countDeletions(str)); } } /* This code is contributed by Mr. Somesh Awasthi */ |
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Python
# Python code to count minimum deletions required # so that there are no consecutive characters left\ def countDeletions(string): ans = 0 for i in range(len(string) - 1): # If two consecutive characters are # the same, delete one of them. if (string[i] == string[i + 1]): ans += 1 return ans # Driver code string = "AAABBB" # Function call to print answer print countDeletions(string) # This code is contributed by Sachin Bisht |
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C#
// C# Program to count minimum deletions // required so that there are no // consecutive characters left using System; class GFG { // Function for counting deletions static int countDeletions(String s) { int ans = 0; char []str = s.ToCharArray(); for (int i = 0; i < str.Length - 1; i++) // If two consecutive characters are // the same, delete one of them. if (str[i] == str[i + 1]) ans++; return ans; } // Driver code public static void Main() { String str = "AAABBB"; // Function call to print answer Console.Write(countDeletions(str)); } } // This code is contributed by Nitin Mittal. |
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PHP
<?php // PHP code to count minimum // deletions required so that // there are no consecutive // characters left function countDeletions($str) { $ans = 0; for ($i = 0; $i < strlen($str) - 1; $i++) // If two consecutive characters are // the same, delete one of them. if ($str[$i] == $str[$i + 1]) $ans++; return $ans; } // Driver Code $str = "AAABBB"; // Function call to // print answer echo countDeletions($str); // This code is contributed by nitin mittal ?> |
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Output:
4
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Improved By : nitin mittal
