n = int(input("num: "))
sum = 0
i = 0
while i<n:
    i = i + 1
    if(i%2==0):
        sum = sum + i
print("sum:", sum)

# Python program to find the sum of integers between 0 and n where n is provided by user
num = int(input("num: "))
#write your logic here
i = 0
s = 0 #sum
if(num>=0):
    while( i <=num ):
        #write your logic here
        s += i
        i += 1
else:
    #write your logic here
    while( i >= num):
        s = s+i
        i = i - 1
print("sum:", s)

x = int(input("x: "))
y = int(input("y: "))
# Write your logic to find out the GCD of x & y
if (x == 0 or y == 0):
    print("value must be non zero")
else:
    for i in range(1,x+1):
        if x%i == 0 and y%i == 0:
            gcd = i
    print("gcd:", gcd)

# Write your code here
x = int(input("k: "))
list1=[0]
a = 1
b= 0
i = 0
s = 0
sum = 0
while b < x:
    s = a+b
    a = b
    b = s

    print(a)
    list1.append(a)
while(i<len(list1)):
    if (i%2 != 0):
        sum  += list1[i]
    i=i+1
print("sum:",sum)

x = int(input("k: "))
i = 0
while( i<x ):
    if i%2 == 0:
        print(f"{i} even number")
    else:
        print(f"{i} odd number")
    i += 1

st2cap = dict()
state = input("state or 'end' to quit: ")
# write condition in while
while( state!="end" ):
    # store the input state & capital in a dictionary till the user enters state as end
    capital= input("capital: ")
    st2cap[state] = capital
    state = input("state: ")
print(sorted(st2cap.items()))