Adds 'Nested Lists' Python Challenge

Author: monoprosito

Python/README.md

@@ -10,3 +10,4 @@
 - Print function: [Challenge](https://www.hackerrank.com/challenges/python-print/problem) - [Solution](https://github.com/monoprosito/hackerrank_challenges/tree/master/Python/print_function)
 - Tuples: [Challenge](https://www.hackerrank.com/challenges/python-tuples/problem) - [Solution](https://github.com/monoprosito/hackerrank_challenges/tree/master/Python/tuples)
 - Find the Runner-Up Score!: [Challenge](https://www.hackerrank.com/challenges/find-second-maximum-number-in-a-list/problem) - [Solution](https://github.com/monoprosito/hackerrank_challenges/tree/master/Python/find_the_runner_up_score)
+- Nested Lists: [Challenge](https://www.hackerrank.com/challenges/nested-list/problem) - [Solution](https://github.com/monoprosito/hackerrank_challenges/tree/master/Python/nested_lists)

Python/nested_lists/README.md

@@ -0,0 +1,73 @@
+### Problem
+
+Given the names and grades for each student in a class of ![equation](https://latex.codecogs.com/gif.latex?N) students, store them in a nested list and print the name(s) of any student(s) having the second lowest grade.
+
+**Note:** If there are multiple students with the second lowest grade, order their names alphabetically and print each name on a new line.
+
+### Example
+
+![equation](https://latex.codecogs.com/gif.latex?records%20%3D%20%5B%5B%22chi%22%2C%2020.0%5D%2C%20%5B%22beta%22%2C%2050.0%5D%2C%20%5B%22alpha%22%2C%2050.0%5D%5D)
+
+The ordered list of scores is ![equation](https://latex.codecogs.com/gif.latex?%5B20.0%2C50.0%5D), so the second lowest score is ![equation](https://latex.codecogs.com/gif.latex?50.0). There are two students with that score: ![equation](https://latex.codecogs.com/gif.latex?%5B%22beta%22%2C%20%22alpha%22%5D). Ordered alphabetically, the names are printed as:
+
+```
+alpha
+beta
+```
+
+### Input Format
+
+The first line contains an integer, ![equation](https://latex.codecogs.com/gif.latex?N), the number of students.
+
+The ![equation](https://latex.codecogs.com/gif.latex?2N) subsequent lines describe each student over ![equation](https://latex.codecogs.com/gif.latex?2) lines.
+
+* The first line contains a student's name.
+
+* The second line contains their grade.
+
+### Constraints
+
+- ![equation](https://latex.codecogs.com/gif.latex?2%20%5Cleq%20N%20%5Cleq%205)
+
+- There will always be one or more students having the second lowest grade.
+
+### Output Format
+
+Print the name(s) of any student(s) having the second lowest grade in. If there are multiple students, order their names alphabetically and print each one on a new line.
+
+### Sample Input 0
+
+```
+5
+Harry
+37.21
+Berry
+37.21
+Tina
+37.2
+Akriti
+41
+Harsh
+39
+```
+
+### Sample Output 0
+
+```
+Berry
+Harry
+```
+
+### Explanation 0
+
+There are ![equation](https://latex.codecogs.com/gif.latex?5) students in this class whose names and grades are assembled to build the following list:
+
+*python students = [['Harry', 37.21], ['Berry', 37.21], ['Tina', 37.2], ['Akriti', 41], ['Harsh', 39]]*
+
+The lowest grade of ![equation](https://latex.codecogs.com/gif.latex?37.2) belongs to Tina.  The second lowest grade of ![equation](https://latex.codecogs.com/gif.latex?37.21) belongs to both Harry and Berry, so we order their names alphabetically and print each name on a new line.
+
+**Author:** [harsh_beria93](https://www.hackerrank.com/profile/harsh_beria93)
+
+**Difficulty:** Easy
+
+**Max Score:** 10

Python/nested_lists/nested_lists.py

@@ -0,0 +1,30 @@
+if __name__ == '__main__':
+    # Create a students list
+    students = list()
+
+    # Create the set to store the scores
+    scores = set()
+
+    for _ in range(int(input())):
+        name = input()
+        score = float(input())
+
+        # Create a list of each student
+        student = [name, score]
+
+        # Add each student score to a set
+        scores.add(score)
+
+        # Add each student list to the general students list
+        students.append(student)
+
+    # Order the set of students scores
+    ordered_scores = sorted(scores)
+
+    # Get the second lowest from the student scores
+    second_lowest_score = ordered_scores[1]
+
+    # Print the student names with the second lowest score
+    for student in sorted(students):
+        if student[1] == second_lowest_score:
+            print(student[0])

Python/nested_lists/test_case_0.txt

@@ -0,0 +1,16 @@
+Input (stdin)
+5
+Harry
+37.21
+Berry
+37.21
+Tina
+37.2
+Akriti
+41
+Harsh
+39
+
+Expected Output
+Berry
+Harry