here is my code for hackerrank nested list problem in python problem link:https://www.hackerrank.com/challenges/nested-list/problem?isFullScreen=true

code:

def sort(sub_li):
    return(sorted(sub_li, key = lambda x: x[1]))
    
if __name__ == '__main__':
    x=int(input ())
    stu=[]
    record=[]
    for i in range(0,x):   
        stu.append(input())
        stu.append(input())
        record.append(stu)
        stu = []
    
    namelist = []
     
    sortedrecord = sort(record)
    print(sortedrecord)
    value = 0
    for i,j in sortedrecord:
        if j>sortedrecord[0][1]:
            
            value = j
            break
    
    for i,j in sortedrecord:
        if j==value:
            namelist.append(i)  
    
    namelist.sort()
    
    for i in namelist:
        print(i)       

problem is that the sort fuction is not sorting properly when it has a score of 10

sample input:

4
Shadab
8
Varun
8.9
Sarvesh
9.5
Harsh
10

output:

[['Harsh', '10'], ['Shadab', '8'], ['Varun', '8.9'], ['Sarvesh', '9.5']]
Shadab

note: i have tried alternative sorting ways ,but the condition remains the same.

CodePudding user response：

In the lexicographic order, 10 comes befor 8, because 1 is before 8

You need to convert to float to get it work like you expect

1. at input

    stu.append(input())
    stu.append(float(input()))
   

2. or at use

   def sort(sub_li):
       return sorted(sub_li, key=lambda x: float(x[1]))