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Update 0279.完全平方数.md

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`‎problems/0279.完全平方数.md‎`

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`@@ -231,6 +231,22 @@ class Solution:`
`231`	`231`
`232`	`232`	`return dp[n]`
`233`	`233`
	`234`	+```
	`235`	`+先遍历背包, 再遍历物品`
	`236`	+```python
	`237`	`+class Solution:`
	`238`	`+ def numSquares(self, n: int) -> int:`
	`239`	`+ dp = [float('inf')] * (n + 1)`
	`240`	`+ dp[0] = 0`
	`241`	`+`
	`242`	`+ for i in range(1, int(n ** 0.5) + 1): # 遍历物品`
	`243`	`+ for j in range(i * i, n + 1): # 遍历背包`
	`244`	`+ # 更新凑成数字 j 所需的最少完全平方数数量`
	`245`	`+ dp[j] = min(dp[j - i * i] + 1, dp[j])`
	`246`	`+`
	`247`	`+ return dp[n]`
	`248`	`+`
	`249`	`+`
`234`	`250`	```
`235`	`251`	`其他版本`
`236`	`252`	```python

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