24.02.20

# n = int(input())

# list = []

# for i in range(0, n):

# s = int(input())

# list.append(s)

# list.sort()

# list.reverse()

# for j in range(n):

# print(list

# data = [10, 20, 30]

#

# print('Before:', data)

# t = data[0]

# data[0] = data[1]

# data[1] = t

#

# print('After:', data)

#

# data2 = [[10, 20, 30], ['A', 'B', 'C'], [10, 'A', 30]]

#

# print('Before:', data2)

#

# t = data2[0]

# data2[0] = data2[1]

# data2[1] = t

#

# print('After:', data2)

# n = int(input())

#

# data = []

#

# for i in range(n):

# x, y = map(int, input().split())

# data.append([i+1, x, y])

#

# for i in range(n):

# for j in range(n-1):

# if data[] > data[i][j]:

#

#

# for j in range(n):

# print(data[j])