a = 3
b = 2

print(a + b) # 5
print(a - b) # 1
print(a * b) # 6
print(a / b) # 1.5

x = 3
y = 4
z = x + y 
z = z + 1
x = y
y = 5
x = z + y + 7
print(x)

a, b, c = int(input()), int(input()), int(input())
print ((a + b - c) * 3)

a = int(input())
print (a//2 + a%2)