print("*********Program for Student Information*********")

D = dict()

n = int(input('How many student record you want to store?? '))

# Add student information
# to the dictionary
for i in range(0, n):
    x, y = input(
        "Enter the complete name (First and last name) of student: ").split()
    z = input("Enter contact number: ")
    m = input('Enter Marks: ')
    D[x, y] = (z, m)

# define a function for shorting
# names based on first name


def sort():
    ls = list()
    # fetch key and value using
    # items() method
    for sname, details in D.items():

        # store key parts as an tuple
        tup = (sname[0], sname[1])

        # add tuple to the list
        ls.append(tup)

    # sort the final list of tuples
    ls = sorted(ls)
    for i in ls:

        # print first name and second name
        print(i[0], i[1])
    return

# define a function for
# finding the minimum marks
# in stored data


def minmarks():
    ls = list()
    # fetch key and value using
    # items() methods
    for sname, details in D.items():
        # add details second element
        # (marks) to the list
        ls.append(details[1])

    # sort the list elemnts
    ls = sorted(ls)
    print("Minimum marks: ", min(ls))

    return

# define a function for searching
# student contact number


def searchdetail(fname):
    ls = list()

    for sname, details in D.items():

        tup = (sname, details)
        ls.append(tup)

    for i in ls:
        if i[0][0] == fname:
            print(i[1][0])
    return

# define a funtion for
# asking the options


def option():

    choice = int(input('Enter the operation detail: \n \
    1: Sorting using first name \n \
    2: Finding Minimum marks \n \
    3: Search contact number using first name: \n \
    4: Exit\n \
    Option: '))

    if choice == 1:
        # finction call
        sort()
        print('Want to perform some other operation??? Y or N: ')
        inp = input()
        if inp == 'Y':
            option()

        # exit finction call
        exit()

    elif choice == 2:
        minmarks()
        print('Want to perform some other operation??? Y or N: ')

        inp = input()
        if inp == 'Y':
            option()
        exit()

    elif choice == 3:
        first = input('Enter first name of student: ')
        searchdetail(first)

        print('Want to perform some other operation??? Y or N: ')
        inp = input()
        if inp == 'Y':
            option()

        exit()
    else:
        print('Thanks for executing me!!!!')
        exit()


option()