Suma de los Nodes de una lista enlazada simple

Dada una lista enlazada simple. La tarea es encontrar la suma de los Nodes de la lista enlazada dada.
 

La tarea es hacer A + B + C+ D.

Ejemplos: 
 

Input: 7->6->8->4->1
Output: 26
Sum of nodes:
7 + 6 + 8 + 4 + 1 = 26

Input: 1->7->3->9->11->5
Output: 36

Solución recursiva: 
 

  • Llame a una función pasando el encabezado y la variable para almacenar la suma.
    • Luego llame recursivamente a la función pasando el siguiente Node actual y la variable de suma.
      • Agregue el valor del Node actual a la suma.

A continuación se muestra la implementación del enfoque anterior: 
 

C++

// C++ implementation to find the sum of
// nodes of the Linked List
#include <bits/stdc++.h>
using namespace std;
  
/* A Linked list node */
struct Node {
    int data;
    struct Node* next;
};
  
// function to insert a node at the
// beginning of the linked list
void push(struct Node** head_ref, int new_data)
{
    /* allocate node */
    struct Node* new_node = new Node;
  
    /* put in the data */
    new_node->data = new_data;
  
    /* link the old list to the new node */
    new_node->next = (*head_ref);
  
    /* move the head to point to the new node */
    (*head_ref) = new_node;
}
  
// function to recursively find the sum of
// nodes of the given linked list
void sumOfNodes(struct Node* head, int* sum)
{
    // if head = NULL
    if (!head)
        return;
  
    // recursively traverse the remaining nodes
    sumOfNodes(head->next, sum);
  
    // accumulate sum
    *sum = *sum + head->data;
}
  
// utility function to find the sum of  nodes
int sumOfNodesUtil(struct Node* head)
{
  
    int sum = 0;
  
    // find the sum of  nodes
    sumOfNodes(head, &sum);
  
    // required sum
    return sum;
}
  
// Driver program to test above
int main()
{
    struct Node* head = NULL;
  
    // create linked list 7->6->8->4->1
    push(&head, 7);
    push(&head, 6);
    push(&head, 8);
    push(&head, 4);
    push(&head, 1);
  
    cout << "Sum of nodes = "
         << sumOfNodesUtil(head);
    return 0;
}

Java

// Java implementation to find the sum of 
// nodes of the Linked List 
class GFG 
{
      
static int sum=0;
      
// A Linked list node /
static class Node
{ 
    int data; 
    Node next; 
} 
  
// function to insert a node at the 
// beginning of the linked list 
static Node push( Node head_ref, int new_data) 
{ 
    // allocate node /
    Node new_node = new Node(); 
  
    // put in the data /
    new_node.data = new_data; 
  
    // link the old list to the new node /
    new_node.next = (head_ref); 
  
    // move the head to point to the new node /
    (head_ref) = new_node; 
    return head_ref;
} 
  
// function to recursively find the sum of 
// nodes of the given linked list 
static void sumOfNodes( Node head) 
{ 
    // if head = null 
    if (head == null) 
        return; 
  
    // recursively traverse the remaining nodes 
    sumOfNodes(head.next); 
  
    // accumulate sum 
    sum = sum + head.data; 
} 
  
// utility function to find the sum of nodes 
static int sumOfNodesUtil( Node head) 
{ 
  
    sum = 0; 
  
    // find the sum of nodes 
    sumOfNodes(head); 
  
    // required sum 
    return sum; 
} 
  
// Driver program to test above 
public static void main(String args[])
{ 
    Node head = null; 
  
    // create linked list 7.6.8.4.1 
    head = push(head, 7); 
    head = push(head, 6); 
    head = push(head, 8); 
    head = push(head, 4); 
    head = push(head, 1); 
  
    System.out.println( "Sum of nodes = "
        + sumOfNodesUtil(head)); 
} 
}
  
// This code is contributed by Arnab Kundu

Python3

# Python3 implementation to find the sum of 
# nodes of the Linked List 
import math
  
# class for a Sum
class Sum:
    tsum = None
  
# A Linked list node 
class Node:
    def __init__(self,data):
        self.data = data
        self.next = None
  
# function to insert a node at the 
# beginning of the linked list 
def push(head, data):
    if not head:
        return Node(data)
  
    # put in the data 
    # and allocate node 
    new_node = Node(data)
  
    # link the old list to the new node 
    new_node.next = head
  
    # move the head to point
    # to the new node 
    head = new_node
    return head
  
# function to recursively find  
# the sum of nodes of the given
# linked list 
def sumOfNode(head, S):
      
    # if head = NULL
    if not head:
        return
      
    # recursively traverse the 
    # remaining nodes
    sumOfNode(head.next, S)
      
    # accumulate sum
    S.tsum += head.data 
  
# utility function to find 
# the sum of nodes
def sumOfNodesUtil(head):
    S = Sum()
    S.tsum = 0
      
    # find the sum of nodes
    sumOfNode(head, S)
      
    # required sum
    return S.tsum
  
# Driver Code
if __name__=='__main__':
    head = None
  
    # create linked list 7->6->8->4->1 
    head = push(head, 7)
    head = push(head, 6)
    head = push(head, 8)
    head = push(head, 4)
    head = push(head, 1)
    print("Sum of Nodes = {}" . 
           format(sumOfNodesUtil(head)))
  
# This code is contributed 
# by Vikash Kumar 37

C#

// C# implementation to find the sum of 
// nodes of the Linked List 
using System;
  
class GFG 
{ 
    public static int sum = 0; 
          
    // A Linked list node / 
    public class Node 
    { 
        public int data; 
        public Node next; 
    } 
      
    // function to insert a node at the 
    // beginning of the linked list 
    static Node push(Node head_ref, int new_data) 
    { 
        // allocate node / 
        Node new_node = new Node(); 
      
        // put in the data / 
        new_node.data = new_data; 
      
        // link the old list to the new node / 
        new_node.next = (head_ref); 
      
        // move the head to point to the new node / 
        (head_ref) = new_node; 
        return head_ref; 
    } 
      
    // function to recursively find the sum of 
    // nodes of the given linked list 
    static void sumOfNodes(Node head) 
    { 
        // if head = null 
        if (head == null) 
            return; 
      
        // recursively traverse the remaining nodes 
        sumOfNodes(head.next); 
      
        // accumulate sum 
        sum = sum + head.data; 
    } 
      
    // utility function to find the sum of nodes 
    static int sumOfNodesUtil(Node head) 
    { 
        sum = 0; 
      
        // find the sum of nodes 
        sumOfNodes(head); 
      
        // required sum 
        return sum; 
    } 
      
    // Driver program to test above 
    public static void Main(String[] args) 
    { 
        Node head = null; 
      
        // create linked list 7.6.8.4.1 
        head = push(head, 7); 
        head = push(head, 6); 
        head = push(head, 8); 
        head = push(head, 4); 
        head = push(head, 1); 
      
        Console.WriteLine("Sum of nodes = " +
                           sumOfNodesUtil(head)); 
    } 
} 
  
// This code is contributed by Rajput-Ji

Javascript

<script>
  
// JavaScript implementation to find the sum of 
// nodes of the Linked List     
var sum = 0;
  
    // A Linked list node /
class Node {
    constructor(val) {
        this.data = val;
        this.next = null;
    }
}
  
  
    // function to insert a node at the
    // beginning of the linked list
    function push(head_ref , new_data) {
        // allocate node /
    var new_node = new Node();
  
        // put in the data /
        new_node.data = new_data;
  
        // link the old list to the new node /
        new_node.next = (head_ref);
  
        // move the head to point to the new node /
        (head_ref) = new_node;
        return head_ref;
    }
  
    // function to recursively find the sum of
    // nodes of the given linked list
    function sumOfNodes(head) {
        // if head = null
        if (head == null)
            return;
  
        // recursively traverse the remaining nodes
        sumOfNodes(head.next);
  
        // accumulate sum
        sum = sum + head.data;
    }
  
    // utility function to find the sum of nodes
    function sumOfNodesUtil(head) {
  
        sum = 0;
  
        // find the sum of nodes
        sumOfNodes(head);
  
        // required sum
        return sum;
    }
  
    // Driver program to test above
      
        var head = null;
  
        // create linked list 7.6.8.4.1
        head = push(head, 7);
        head = push(head, 6);
        head = push(head, 8);
        head = push(head, 4);
        head = push(head, 1);
  
        document.write("Sum of nodes = " + 
        sumOfNodesUtil(head));
  
// This code contributed by umadevi9616
  
</script>
Producción: 

Sum of nodes = 26

 

Complejidad de tiempo: O(N), N es el número de Nodes en una lista enlazada. 
Espacio auxiliar: O(N), solo si se considera el tamaño de la pila durante las llamadas recursivas.
Solución iterativa: 
 

  1. Inicialice un puntero ptr con el encabezado de la lista enlazada y una variable de suma con 0.
  2. Comience a recorrer la lista vinculada utilizando un bucle hasta que se atraviesen todos los Nodes.
    • Agregue el valor del Node actual a la suma, es decir , suma += ptr -> datos .
    • Incremente el puntero al siguiente Node de la lista enlazada, es decir , ptr = ptr ->next .
  3. Devolver la suma .

Complete Interview Preparation - GFG

A continuación se muestra la implementación del enfoque anterior: 
 

C++

// C++ implementation to find the sum of
// nodes of the Linked List
#include <bits/stdc++.h>
using namespace std;
  
/* A Linked list node */
struct Node {
    int data;
    struct Node* next;
};
  
// function to insert a node at the
// beginning of the linked list
void push(struct Node** head_ref, int new_data)
{
    /* allocate node */
    struct Node* new_node = new Node;
  
    /* put in the data */
    new_node->data = new_data;
  
    /* link the old list to the new node */
    new_node->next = (*head_ref);
  
    /* move the head to point to the new node */
    (*head_ref) = new_node;
}
  
// function to find the sum of
// nodes of the given linked list
int sumOfNodes(struct Node* head)
{
    struct Node* ptr = head;
    int sum = 0;
    while (ptr != NULL) {
  
        sum += ptr->data;
        ptr = ptr->next;
    }
  
    return sum;
}
  
// Driver program to test above
int main()
{
    struct Node* head = NULL;
  
    // create linked list 7->6->8->4->1
    push(&head, 7);
    push(&head, 6);
    push(&head, 8);
    push(&head, 4);
    push(&head, 1);
  
    cout << "Sum of nodes = "
         << sumOfNodes(head);
    return 0;
}

Java

// Java implementation to find the sum of
// nodes of the Linked List
  
class GFG 
{
  
static Node head; 
  
/* A Linked list node */
static class Node
{
    int data;
    Node next;
};
  
// function to insert a node at the
// beginning of the linked list
// Inserting node at the beginning
static Node push(Node head_ref, int new_data)
{
    /* allocate node */
    Node new_node = new Node();
      
    /* put in the data */
    new_node.data = new_data;
      
    /* link the old list to the new node */
    new_node.next = head_ref;
      
    /* move the head to point to the new node */
    head_ref = new_node;
    return head=head_ref;
}
  
// function to find the sum of
// nodes of the given linked list
static int sumOfNodes( Node head)
{
    Node ptr = head;
    int sum = 0;
    while (ptr != null) 
    {
  
        sum += ptr.data;
        ptr = ptr.next;
    }
  
    return sum;
}
  
// Driver code
public static void main(String[] args)
{
    // create linked list 7.6.8.4.1
    push(head, 7);
    push(head, 6);
    push(head, 8);
    push(head, 4);
    push(head, 1);
  
    System.out.println("Sum of nodes = "
        + sumOfNodes(head));
}
}
  
/* This code is contributed by PrinciRaj1992 */

Python3

# Python3 implementation to find the 
# sum of nodes of the Linked List
import math 
  
# A Linked list node 
class Node: 
    def __init__(self, data): 
        self.data = data 
        self.next = None
  
# function to insert a node at the
# beginning of the linked list
def push(head_ref, new_data):
      
    # allocate node 
    new_node = Node(new_data)
  
    # put in the data 
    new_node.data = new_data
  
    # link the old list to the new node 
    new_node.next = head_ref
  
    # move the head to po to the new node 
    head_ref = new_node
    return head_ref
  
# function to find the sum of
# nodes of the given linked list
def sumOfNodes(head):
    ptr = head
    sum = 0
    while (ptr != None):
  
        sum = sum + ptr.data
        ptr = ptr.next
      
    return sum
  
# Driver Code
if __name__=='__main__':
    head = None
  
    # create linked list 7.6.8.4.1
    head = push(head, 7)
    head = push(head, 6)
    head = push(head, 8)
    head = push(head, 4)
    head = push(head, 1)
  
    print("Sum of nodes =", 
           sumOfNodes(head))
      
# This code is contributed by Srathore

C#

// C# implementation to find the sum of 
// nodes of the Linked List 
using System;
  
class GFG 
{ 
  
static Node head; 
  
/* A Linked list node */
public class Node 
{ 
    public int data; 
    public Node next; 
}; 
  
// function to insert a node at the 
// beginning of the linked list 
// Inserting node at the beginning 
static Node push(Node head_ref, int new_data) 
{ 
    /* allocate node */
    Node new_node = new Node(); 
      
    /* put in the data */
    new_node.data = new_data; 
      
    /* link the old list to the new node */
    new_node.next = head_ref; 
      
    /* move the head to point to the new node */
    head_ref = new_node; 
    return head=head_ref; 
} 
  
// function to find the sum of 
// nodes of the given linked list 
static int sumOfNodes( Node head) 
{ 
    Node ptr = head; 
    int sum = 0; 
    while (ptr != null) 
    { 
  
        sum += ptr.data; 
        ptr = ptr.next; 
    } 
  
    return sum; 
} 
  
// Driver code 
public static void Main(String[] args) 
{ 
    // create linked list 7.6.8.4.1 
    push(head, 7); 
    push(head, 6); 
    push(head, 8); 
    push(head, 4); 
    push(head, 1); 
  
    Console.WriteLine("Sum of nodes = "
        + sumOfNodes(head)); 
} 
} 
  
// This code is contributed by 29AjayKumar

Javascript

<script>
// javascript implementation to find the sum of
// nodes of the Linked List
    var head;
  
    /* A Linked list node */
     class Node {
        constructor() {
            this.data = 0;
            this.next = null;
        }
    }
   
  
    // function to insert a node at the
    // beginning of the linked list
    // Inserting node at the beginning
    function push(head_ref , new_data) {
        /* allocate node */
var new_node = new Node();
  
        /* put in the data */
        new_node.data = new_data;
  
        /* link the old list to the new node */
        new_node.next = head_ref;
  
        /* move the head to point to the new node */
        head_ref = new_node;
        return head = head_ref;
    }
  
    // function to find the sum of
    // nodes of the given linked list
    function sumOfNodes(head) {
var ptr = head;
        var sum = 0;
        while (ptr != null) {
  
            sum += ptr.data;
            ptr = ptr.next;
        }
  
        return sum;
    }
  
    // Driver code
      
        // create linked list 7.6.8.4.1
        push(head, 7);
        push(head, 6);
        push(head, 8);
        push(head, 4);
        push(head, 1);
  
        document.write("Sum of nodes = " + sumOfNodes(head));
  
// This code contributed by aashish1995
</script>
Producción: 

Sum of nodes = 26

 

Complejidad de tiempo: O(N), N es el número de Nodes en una lista enlazada. 
Espacio Auxiliar: O(1)
 

Publicación traducida automáticamente

Artículo escrito por Rajput-Ji y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA

Deja una respuesta

Tu dirección de correo electrónico no será publicada. Los campos obligatorios están marcados con *