Problem2659--蓝桥杯真题训练之 - 等差数列

2659: 蓝桥杯真题训练之 - 等差数列

[Creator : ]
Time Limit : 1.000 sec  Memory Limit : 128 MB

SubmitSolved: 8Submit Num: 32Statistics

Description



Sample Input Copy 

5
2 6 4 10 20

Sample Output Copy 

10

Source/Category

蓝桥杯 
Submit