>>>3*15+27//4
st="Beijing has become a unique 'double Olympic' city in the world."
count=0
for i in st:
if i=='i':
count=count+1
print(count)
分面包问题:已知,一个大人一餐吃3个面包,3个幼儿一餐吃2个面包,在一次100人的聚餐中发现大人和小孩一共吃了100个面包,其中大人人数多于小孩人数相等,请问大人和小孩各有多少人?
for i in range(1,100):
for j in range(1,100):
if :
if i>j:
print(i,j)