Please help to understand, why i am getting runtime error

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this is my solution, i used merge sort in linked lists, but i am getting runtime error, can you please help me why?

class Node:
    def __init__(self, data):
        self.data = data
        self.next = None

# output Function
def mergelist(l, r):
    if not l:
        return r
    if not r:
        return l
    if l.data < r.data:
        l.next = mergelist(l.next, r)
        return l
    else:
        r.next = mergelist(r.next, l)
        return r

def merge(L):
    if not L:
        return None
    if len(L) == 1:
        return L[0]
    else:
        mid = len(L) // 2
        l = merge(L[:mid])
        r = merge(L[mid:])
        return mergelist(l, r)
  
if __name__ == '__main__':
    t = int(input())
    L = []
    for T in range(t):
        l = list(map(int , input().split(" ")))
        A = Node(l[1])
        L.append(A)
        if len(l) > 2:
            for i in range(2, l[0]+1):
                A.next = Node(l[i])
                A = A.next
    a = merge(L)
    print(a)
2

class Node:
def init(self, data):
self.data = data
self.next = None
def str(self):
return str(self.dict)

output Function

def mergelist(l, r):
if not l:
return r
if not r:
return l
if l.data < r.data:
l.next = mergelist(l.next, r)
return l
else:
r.next = mergelist(r.next, l)
return r

def merge(L):
if not L:
return None
if len(L) == 1:
return L[0]
else:
mid = len(L) // 2
l = merge(L[:mid])
r = merge(L[mid:])
return mergelist(l, r)

if name == ‘main’:
t = int(input())
L = []
for T in range(t):
l = list(map(int , input().split(" ")))
A = Node(l[T])
L.append(A)
if len(l) > 2:
for i in range(2, l[0]+1):
A.next = Node(l[i])
A = A.next
a = merge(L)
print(a)
TRY THIS
PRINT WHAT YOU WANT

1 Like
3

It is returning a string
I wrote a special method and insert it in your class so that you may not get any trouble further
If you want further assistance reply me with the value you want from this

1 Like