1.
2^20
2.
在0~~10或0中 筛选出能被3整除或7整除并且都能被21整除
3
x = 1
for x in range(1,101):
num += x
print(num)
num1 = 0
y = 1
while y<=100:
num1 += y
y += 1
print(num1)
num = 0
x = 1
for x in range(1,101):
if x%3==0:
num += x
print(num)
y = 1
num1= 0
while y <=100:
if y%3==0:
num1+=y
print(num1)
x=1
sum =0
while x<=100:
if x%7!=0:
sum+=x
x+=1
print(sum)
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