Commit 3469a79

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one line get max matrix val

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Original file line number	Diff line number	Diff line change
`@@ -128,6 +128,8 @@ presums = list(accumulate([1,2,3])) # [1, 3, 6]`
`128`	`128`	`allsum = sum(map(sum, matrix)) # 或者 allsum = sum((sum(row) for row in matrix))`
`129`	`129`	`# 一行代码判断一个元素是否在矩阵中,比如判断 1 是否在矩阵matrix中`
`130`	`130`	`any(1 in row for row in matrix)`
	`131`	`+# 一行代码获取矩阵最大、最小值`
	`132`	`+maxval = max(map(max, matrix))`
`131`	`133`	```
`132`	`134`
`133`	`135`	`# python dict 技巧`

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