# data[].attributes.attachment_link.readable_text
from math import*

N=int(input("N?"))
M=N//2

if 2*M==N:
    print("PAIR")
else:
    print("IMPAIR")


# data[].attributes.attachment_link.readable_text
from math import*

N=int(input("N?"))

R=0

for i in range(1,N+1,2):
    R=R+i

print(R)

# data[].attributes.attachment_link.readable_text
from math import*

xA=float(input("Abscisse du point A?"))
yA=float(input("Ordonn��e du point A?"))

xB=float(input("Abscisse du point B?"))
yB=float(input("Ordonn��e du point B?"))

d=sqrt( (xB-xA)**2 + (yB-yA)**2)

print("La distance AB vaut: ",d)


# data[].attributes.attachment_link.readable_text
from math import*

N=int(input("N?"))
R=1

while N>=10:
    R=R+1
    N=N/10

print(R)
