py lab 1

#py lab 1
#1
print("Сonditions: a, b = (1..100)")
a = int(input("Enter a: "))
b = int(input("Enter b: "))
while (a < 1 or a > 100 or b < 1 or b > 100):
  print("ERROR: invalid values")
  print("Enter a, b again")
  a = int(input("Enter a: "))
  b = int(input("Enter b: "))
if a > b:
  x = a / b + 1
elif a == b:
  x = -2
else:
  x = (a - b) / b
print("Result: {0}".format(x))

#2
N = 30
sum = 0
for i in range(N):
  sum += 1 / (i+1)
print("Result: {0}".format(sum))

#3
N = int(input("Enter N: "))
for i in range(N):
  print(i * 2 * ' ', end='')
  for j in range(i, N):
    print(j + 1, end=' ')
  print()