4778: P3131 [USACO16JAN] Subsequences Summing to Sevens S（普及-）

Memory Limit：128 MB Time Limit：1.000 S
Judge Style：Text Compare Creator：
Submit：3 Solved：3

Description

Input

Output

Sample Input Copy 

7
3
5
1
6
2
14
10

Sample Output Copy 

5

HINT

Source/Category

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