counter = 1
print(counter)       # 1

counter += 1        # counter = counter + 1
print(counter)       # 2

counter -= 1
print(counter)       # 1

counter *= 10
print(counter)       # 10

counter /= 5
print(counter)      # 2

#multiply by 100
counter *= 100
print(counter)      # 200

#decrease by 50
counter -= 50
print(counter)

#modulu
counter %= 3
print(counter)