20241119

# a, b = map(int, input().split("x"))
# # n = -b / a
# # print(format(n, ".2f"))
# # print("%.2f"%n)
'''a, t = input().split("x")
b, c = t.split("=")
a=int(a)
b=int(b)
c=int(c)
n = -(b-c) / a
print("%.2f"%n)

a = []

a.append([3,4])
a.append([1,2,3])

print(a)

print(a[0][0],a[0][1])
print(a[1][0],a[1][1],a[1][2])

for i in range(len(a)) :
    for j in range(len(a[i])) :
        print(a[i][j],end=' ')
    print()


b = [ [1,2,3] for i in range(5)]

c = [ [0 for j in range(4)]  for i in range(3)  ]
# [0,0,0,0] * 3
print(c)
'''
a=[]
n=int(input())