从字符串中删除三个连续的重复项

给定一个字符串，您必须从字符串中删除三个连续的重复项。如果没有三个是连续的，则按原样输出字符串。
例子：

Input : aabbbaccddddc
Output :ccdc

Input :aabbaccddc
Output :aabbaccddc

解释 ：
我们将字符串字符插入到向量中，并不断检查向量的大小。如果向量的大小大于 2，那么我们将检查字符串的最后 3 个字符是否相同。如果字符相同
然后我们将使用 resize() 在数组中向后移动三步，否则不会。

C++

// C++ program to remove three consecutive
// duplicates
#include 
using namespace std;
 
// function to remove three consecutive
// duplicates
void remove3ConsecutiveDuplicates(string str)
{
    vector v;
    for (int i = 0; i < str.size(); ++i) {
        v.push_back(str[i]);
 
        if (v.size() > 2) {
            int sz = v.size();
 
            // removing three consecutive duplicates
            if (v[sz - 1] == v[sz - 2] &&
                v[sz - 2] == v[sz - 3]) {
                v.resize(sz - 3); // Removing three characters
                                 // from the string
            }
        }
    }
 
    // printing the string final string
    for (int i = 0; i < v.size(); ++i)
        cout << v[i];
}
 
// driver code
int main()
{
    string str = "aabbbaccddddc";
 
    remove3ConsecutiveDuplicates(str);
    return 0;
}

Java

// Java program to remove three consecutive
// duplicates
import java.util.*;
 
class GFG
{
 
// function to remove three consecutive
// duplicates
static void remove3ConsecutiveDuplicates(String str)
{
    Vector v = new Vector<>();
    for (int i = 0; i < str.length(); ++i)
    {
        v.add(str.charAt(i));
 
        if (v.size() > 2)
        {
            int sz = v.size();
 
            // removing three consecutive duplicates
            if (v.get(sz - 1) == v.get(sz - 2) &&
                v.get(sz - 2) == v.get(sz - 3))
            {
                v.setSize(sz - 3); // Removing three characters
                                // from the string
            }
        }
    }
 
    // printing the string final string
    for (int i = 0; i < v.size(); ++i)
        System.out.print(v.get(i));
}
 
// Driver code
public static void main(String[] args)
{
    String str = "aabbbaccddddc";
    remove3ConsecutiveDuplicates(str);
}
}
 
// This code contributed by Rajput-Ji

Python3

# Python3 program to remove three consecutive duplicates
 
# function to remove three consecutive duplicates
def remove3ConsecutiveDuplicates(string):
    val = ""
    i = 0
    while (i < len(string)):
        if (i < len(string) - 2 and
            string[i] * 3 == string[i:i + 3]):
            i += 3
        else:
            val += string[i]
            i += 1
             
    if (len(val) == len(string)):
        return val
    else:
        return remove3ConsecutiveDuplicates(val)
 
# Driver code
string = "aabbbaccddddc"
val = remove3ConsecutiveDuplicates(string)
print(val)
 
# This code is contributed by
# Shubham Singh(SHUBHAMSINGH10)

C#

// C# program to remove three consecutive
// duplicates
using System;
using System.Collections.Generic;
 
class GFG
{
 
// function to remove three consecutive
// duplicates
static void remove3ConsecutiveDuplicates(String str)
{
    List v = new List();
    for (int i = 0; i < str.Length; ++i)
    {
        v.Add(str[i]);
 
        if (v.Count > 2)
        {
            int sz = v.Count;
 
            // removing three consecutive duplicates
            if (v[sz - 1] == v[sz - 2] &&
                v[sz - 2] == v[sz - 3])
            {
                v.RemoveRange(sz-3,3); // Removing three characters
                                // from the string
            }
        }
    }
 
    // printing the string final string
    for (int i = 0; i < v.Count; ++i)
        Console.Write(v[i]);
}
 
// Driver code
public static void Main(String[] args)
{
    String str = "aabbbaccddddc";
    remove3ConsecutiveDuplicates(str);
}
}
 
// This code has been contributed by 29AjayKumar

PHP

 2)
        {
            $sz = count($v);
 
            // removing three consecutive duplicates
            if ($v[$sz - 1] == $v[$sz - 2] &&
                $v[$sz - 2] == $v[$sz - 3])
            {
                array_pop($v);
                array_pop($v);
                array_pop($v);
                // Removing three characters
                                // from the string
            }
        }
    }
 
    // printing the string final string
    for ($i = 0; $i < count($v); ++$i)
        echo $v[$i];
}
 
    // Driver code
    $str = "aabbbaccddddc";
 
    remove3ConsecutiveDuplicates($str);
 
// This code is contributed by mits
?>

Javascript

// Javascript program to remove three consecutive
// duplicates
 
// function to remove three consecutive
// duplicates
function remove3ConsecutiveDuplicates(str)
{
    let v = [];
    for (let i = 0; i < str.length; ++i)
    {
        v.push(str[i]);
   
        if (v.length > 2)
        {
            let sz = v.length;
   
            // removing three consecutive duplicates
            if (v[sz - 1] == v[sz - 2] &&
                v[sz - 2] == v[sz - 3])
            {
                v.pop();
                v.pop();
                v.pop();
                // Removing three characters
                                // from the string
            }
        }
    }
   
    // printing the string final string
    for (let i = 0; i < v.length; ++i)
        document.write(v[i]);
}
 
// Driver code
let str = "aabbbaccddddc";
remove3ConsecutiveDuplicates(str);
 
// This code is contributed by rag2127

输出：

ccdc