#726. 【基础】求2+2*2+2*2*2+…+2*2*2*….*2
-
ID: 726
Type: Default
1000ms
128MiB
Tried: 0
Accepted: 0
Difficulty: (None)
Uploaded By:
admin
Tags> 【基础】求2+2*2+2*2*2+…+2*2*2*….*2
说明
求2+2*2+2*2*2+…+2*2*2*….*2的和是多少？最后一项有多少2相乘由键盘读入的n决定（1<=n<=100）！
比如：n=3，那么s=2+2*2+2*2*2=14！