sum = 0
x = 0
n=1
while True:
    x = x + 1
    if x > 100:
        break
    while x==2*n:#这里要用==而且要写2*n，这个while和下面的if都是和第一个if平级
        n=n+1 
        continue
    if n>51:
       break
    sum=sum+x
print sum

sum = 0
x = 0
while True:
    x = x + 1
    if x > 100:
        break
    if x%2==0:
        continue;
    else:
        sum+=x;
print sum