Problem:
Celsius/Fahrenheit In Japan, temperature is usually expressed using the Celsius (℃) scale. In America, they used the Fahrenheit (℉) scale instead. $20$ degrees Celsius is roughly equal to $68$ degrees Fahrenheit. A phrase such as "Today’s temperature is $68$ degrees" is commonly encountered while you are in America. A value in Fahrenheit can be converted to Celsius by first subtracting $32$ and then multiplying by $\frac{5}{9}$. A simplified method may be used to produce a rough estimate: first subtract $30$ and then divide by $2$. Using the latter method, $68$ Fahrenheit is converted to $19$ Centigrade, i.e., $\frac{(68-30)}{2}$. Make a program to convert Fahrenheit to Celsius using the simplified method: $C = \frac{F - 30}{2}$. Input The input is given in the following format. $F$ The input line provides a temperature in Fahrenheit $F$ ($30 \leq F \leq 100$), which is an integer divisible by $2$. Output Output the converted Celsius temperature in a line. Sample Input 1 68 Sample Output 1 19 Sample Input 2 50 Sample Output 2 10

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):


F = int(input())
C = (F-30)/2
print(int(C))

Solution (Python):
a=int(input())
print((a-30)//2)

Solution (Python):
f=int(input())
print(f'{(f-30)/2:.0f}')

Solution (Python):
print(int((int(input())-30)/2))

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
f=int(input())
print((f-30)//2)

Solution (Python):
f=int(input())
c=int((f-30)/2)

print(c)

Solution (Python):
x = input()
x = int(x)
y = (x-30)/2
print(int(y))

Solution (Python):
a=int(input())
print(int((a-30)/2))

Solution (Python):
print(((int(input())) -30)//2)

Solution (Python):
x=int(input())
c=int((x-30)/2)
print(c)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
def to_cels(f):
    return (f-30)/2
while True:
    try:
        f=int(input())
        print(int(to_cels(f)))
    except:
        break

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
x = int(input())
print((x-30)//2)

Solution (Python):
F=int(input());C=(F-30)/2;print(int(C))

Solution (Python):
def FtoC(F):
    C=(F-30)/2
    return C

F=int(input())
print(int(FtoC(F)))

Solution (Python):
F=int(input())
def C(F):
    C=(F-30)//2
    return C
print(C(F))

Solution (Python):
def fah(F):
    C=int((F-30)/2)
    return C
f=int(input())
print(fah(f))

Solution (Python):
def F(f):
    return (f-30)//2

a=int(input())
print(F(a))

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
print(int((int(input())-30)/2))

Solution (Python):
f = int(input())

print( (f-30)//2 )

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
a=int(input())
print((a-30)//2)

Solution (Python):
a=int(input())
c=a-30
d=int(c/2)
print(d)

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
f=int(input())
print((f-30)//2)

Solution (Python):
print(int((int(input()) - 30) / 2))

Solution (Python):
w=int(input())
print(int((w-30)/2))

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
F = int(input())
print((F - 30) // 2)

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
a = int(input())
print(int((a-30)/2))

Solution (Python):
F=int(input())
if 30<=F<=100:
    C=int((F-30)/2)
    print(C)
else:
    pass

Solution (Python):
F=int(input())
C=int((F-30)/2)
print(C)

Solution (Python):
import math
F = int(input())
print(math.floor((F - 30) / 2))

Solution (Python):


F = int(input())
C = int (F-30)//2

print(C)

Solution (Python):
x=int(input())
print(int((x-30)/2))

Solution (Python):
x=int(input())

print(int((x-30)*1/2))

Solution (Python):
f = int(input())
print(int((f-30) / 2))

Solution (Python):
f=int(input())
c=(f-30)//2
print(c)

Solution (Python):
F = int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):



F = int(input())
print((F-30)//2)

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
print( (int(input())-30)//2 )

Solution (Python):


x=int(input())
print((x-30)//2)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
x=int(input())
print((x-30)//2)

Solution (Python):
F = int(input())
print(int((F-30)/2))

Solution (Python):
F = int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
F = int(input())
C = (F-30)/2

print(int(C))

Solution (Python):
a=int(input())
print((a-30)//2)

Solution (Python):
import math
F = int(input())
print(math.floor((F - 30)/2))

Solution (Python):


F=int(input())

print(int((F-30)/2))

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
F=int(input())
if 30<=F<=100:
   C=int((F-30)/2)
   print(C)
else:
   pass

Solution (Python):
x=int(input())
print(int((x-30)/2))

Solution (Python):
f=int(input())
print(int((f-30)/2))

Solution (Python):
x=int(input())
print(int((x-30)/2))

Solution (Python):
x = int(input())
print(int((x-30) / 2))

Solution (Python):
x=int(input())
print(int((x-30)/2))

Solution (Python):
x=int(input())
print(int((x-30)/2))

Solution (Python):
F = int(input())
C = ((F-30)//2)
print(C)

Solution (Python):
F = int(input())
C=(F-30)//2
print(C)

Solution (Python):
F=int(input())
x=F-30
C=int(x/2)
print(C)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):

F = int(input())
print((F - 30) // 2)

Solution (Python):
f=int(input())
c=int((f-30)/2)
print(c)

Solution (Python):
F=int(input())
C=int((F-30)/2)
print(C)

Solution (Python):
F=int(input())
c=(F-30)//2
print(c)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
x=int(input())
y=int((x-30)/2)
print(y)

Solution (Python):
F = int(input())
C = (F - 30) // 2
print(C)

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
f=int(input())
c=(f-30)//2
print(c)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
f=int(input())
c=(f-30)//2
print(c)

Solution (Python):
a=int(input())
print(int(a-30)//2)

Solution (Python):
a = int(input())
print(int((a-30)/2))

Solution (Python):
F=int(input())
C=int((F-30)/2)
format(C,'.0f')
print(C)

Solution (Python):
i=int(input())
print((i-30)//2)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
F=int(input())
print(round((F-30)/2))

Solution (Python):
F=int(input())
C=(F-30)/2
print(int(C))

Solution (Python):
F = int(input())
C = F - 30
C = int( F - 30)//2
print(C)

Solution (Python):
f=int(input())
c=int((f-30)/2)
print(c)

Solution (Python):
c=int(input())
x=c-30
print(int(x/2))

Solution (Python):
F=int(input())
C=int((F-30)/2)
print(C)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
import math
F = int(input())
print(int((F-30)/2))

Solution (Python):
import math
f=int(input())
c=int((f-30)/2)
print(c)

Solution (Python):
a = int(input())
print('{:.0f}'.format((a-30)/2))

Solution (Python):
F=int(input())
C=int((F-30)/2)
print(C)

Solution (Python):
F=int(input())
C=(F-30)/2
print(int(C))

Solution (Python):
F = int(input())
C = (F-30)//2
print(C)

Solution (Python):
a=int(input())
print((a-30)//2)

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
F = int(input())
print((F-30)/2)

Solution (Python):
f=int(input())
print((f-30)//2)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
F = int(input())
print(int((F-30)/2))

Solution (Python):
f = int(input())
print(int((f-30)/2))

Solution (Python):
F=int(input())
C=(F-30)/2
print(int(C))

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):



F = int(input())
print(int((F - 30) / 2))

Solution (Python):
f=int(input())
c=(f-30)/2
c=int(c)
print(c)

Solution (Python):
F = int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
F = int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
F = int(input())
C = (F-30)/2
print('{:.0f}'.format(C))

Solution (Python):
F = int(input())
C = int((F-30)/2)
print(C)

Solution (Python):
F = int(input())
import math
print(math.floor((F-30)/2))

Solution (Python):
f=int(input())
c=(f-30)//2
print(c)

Solution (Python):
F = int(input())
C = (F-30)/2
print(round(C))

Solution (Python):
x=input()
x=int(x)
y=(x-30)//2
print(y)

Solution (Python):
F= int(input())
print((F-30)//2)

Solution (Python):
F = int(input())
print( (F - 30) // 2)

Solution (Python):



F=int(input())
A = int((F-30)/2)
print('%d'%A)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
import math
p=int(input())
c=(p-30)/2

print(math.floor(c))

Solution (Python):
x=int(input())
print(round((x-30)/2))

Solution (Python):
F = int(input())
print ((F-30)//2)

Solution (Python):
F = int(input())
print(round((F - 30) / 2))

Solution (Python):
a=int(input())
print((a-30)//2)

Solution (Python):
f = int(input())
print((f-30)//2)

Solution (Python):
F = int(input())
C = int((F-30)/2)
print(C)

Solution (Python):
F =int(input())
C =int((F-30)/2)
print(C)

Solution (Python):
a= int(input())
b=a-30
x=divmod(b,2)
print(x[0])

Solution (Python):
C = int(input())
F = (C-30)/2
print(int(F))

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
F=int(input())
C=int((F-30)/2)
print(C)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
F=int(input())
print((int)((F-30)/2))

Solution (Python):


a = int(input())
print((a-30)//2)

Solution (Python):
F = int(input())
a = int((F - 30) / 2)
print(a)

Solution (Python):
F = int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
if F%2==0:
    C=(F-30)//2
    print(int(C))
else:
    pass

Solution (Python):
F=int(input())
C=int((F-30)/2)
print(C)

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
a=int(input())
print(int((a-30)/2))

Solution (Python):
F=int(input())
if F%2==0:
    c=(F-30)//2
    print(int(c))

Solution (Python):
F=int(input())
if F%2==0:
    print(int((F-30)/2))
else:
    pass

Solution (Python):
a=int(input())
print((a-30)//2)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
F=int(input())
C=(F-30)/2
print('{:0.0f}'.format(C))

Solution (Python):
F=int(input())
C=(F-30)/2
print(int(C))

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
C=int((F-30)/2)
print(C)

Solution (Python):



F = int(input())
print(int((F - 30) / 2))

Solution (Python):
F = int(input())
C = int((F-30)/2)
print(C)

Solution (Python):
F=int(input())
print(int((F-30)/2))

Solution (Python):


f=int(input())
print((f-30)//2)

Solution (Python):
a = int(input())

print((a-30)//2)

Solution (Python):

F=int(input())
print(int((F-30)/2))

Solution (Python):
F=int(input())
C=int((F-30)/2)
print(C)

Solution (Python):
print(int(input())-30>>1)

Solution (Python):
F = int(input())

print((F - 30) // 2)

Solution (Python):
F=int(input())
C=(F-30)//2
print(C)

Solution (Python):
f = int(input())
print(int((f - 30) / 2))

Solution (Python):
f=int(input())
print((f-30)//2)

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
f = int(input())
print((f-30)//2)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
n = int(input())

print((n-30)//2)

Solution (Python):
print( (int(input())-30)// 2)

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
print((int(input())-30)//2)

Solution (Python):

def solve():
    print(int((int(input()) - 30) / 2))


if __name__ == '__main__':
    solve()

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
F = int(input())
C = (F-30)/2
print(int(C))

Solution (Python):
F = int(input())
C = (F - 30) // 2
print(C)

Solution (Python):
a = int(input())
print((a-30)//2)

Solution (Python):
f=int(input())
C=(f-30)//2
print(C)

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
F = int(input())
T = (F-30)//2
print(T)

Solution (Python):
print((int(input())-30)//2)

Solution (Python):


import sys
import math 

def main():
     f = int(input())
     c = int((f - 30) / 2)
     print(c)

if __name__ == '__main__':
    main()

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):
x = int(input())
print(int((x-30)/2))

Solution (Python):
F = int(input())
print((F - 30) // 2)

Solution (Python):
print(int((int(input())-30) / 2))

Solution (Python):
F=int(input())
print((F-30)//2)

Solution (Python):
F = int(input())
print((F - 30) // 2)

Solution (Python):
f = int(input())
print((f - 30) // 2)

Solution (Python):
print(int(input())//2-15)

Solution (Python):
F = int(input())
print((F-30)//2)

Solution (Python):


print(int((int(input()) - 30) / 2))

Solution (Python):
print((int(input())-30)//2)

Solution (Python):
f = int(input())
c = (f - 30) // 2
print(c)

Solution (Python):
kashi = int(input())
sesshi = int((kashi - 30)/2)
print(sesshi)

Solution (Python):
f = int(input())
print((f-30)//2)

Solution (Python):
F = int(input())

C = ((F - 30) // 2)

print(C)

Solution (Python):
print( (int(input())-30)//2 )

Solution (Python):
f=int(input())
kotae=f-30
print(kotae//2)

Solution (Python):
print((int(input())-30)//2)