7913: Art
内存限制：512 MB
时间限制：2.000 S
评测方式：文本比较
命题人：
提交：1
解决：1
题目描述
Vera has five sticks of distinct lengths l1, l2, l3, l4, l5. Vera may choose any three of the five sticks to form
the sides of a triangle. How many different triangles can Vera make? Each triangle must have positive
area and sticks cannot be bent or cut.
输入
Line 1 contains integers l1, l2, l3, l4, l5 (1 ≤ li ≤ 1000).
输出
Print one line with one integer, the number of ways to form a triangle.
样例输入 复制
1 2 3 4 5
样例输出 复制
3