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2965. Find Missing and Repeated Values

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	`1`	`+class Solution {`
	`2`	`+`
	`3`	`+ // Solution by Sergey Leschev`
	`4`	`+ // 2965. Find Missing and Repeated Values`
	`5`	`+`
	`6`	`+ // Time complexity: O(n * n)`
	`7`	`+ // Space complexity: O(n * n)`
	`8`	`+`
	`9`	`+ func findMissingAndRepeatedValues(_ grid: [[Int]]) -> [Int] {`
	`10`	`+ var freq = [Int: Int]()`
	`11`	`+ let n = grid.count`
	`12`	`+`
	`13`	`+ for i in 0..<n {`
	`14`	`+ for j in 0..<n {`
	`15`	`+ freq[grid[i][j], default: 0] += 1`
	`16`	`+ }`
	`17`	`+ }`
	`18`	`+`
	`19`	`+ var repeated = 0`
	`20`	`+ var missing = 0`
	`21`	`+`
	`22`	`+ for i in 1...(n * n) {`
	`23`	`+ if freq[i] == 2 {`
	`24`	`+ repeated = i`
	`25`	`+ }`
	`26`	`+ if freq[i] == nil {`
	`27`	`+ missing = i`
	`28`	`+ }`
	`29`	`+ }`
	`30`	`+`
	`31`	`+ return [repeated, missing]`
	`32`	`+ }`
	`33`	`+}`

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