a = 10
x = 100
b = 0
y = int(raw_input('give a number:'))
while(x>=10):
    if(y/a)<10:
        if(b == 0):
             x = y/10
        else:
             x = y/(10**b)
    else:
        a = a*10
        b = b + 1
print(x)