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solve: 74. Search a 2D Matrix in rust

Signed-off-by: rajput-hemant <rajput.hemant2001@gmail.com>

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	`1`	`+impl Solution {`
	`2`	`+ pub fn search_matrix(matrix: Vec<Vec<i32>>, target: i32) -> bool {`
	`3`	`+ let (mut rows, mut cols) = (0, matrix[0].len() - 1);`
	`4`	`+`
	`5`	`+ while rows < matrix.len() && cols > 0 {`
	`6`	`+ if matrix[rows][cols] == target {`
	`7`	`+ return true;`
	`8`	`+ } else if matrix[rows][cols] > target {`
	`9`	`+ cols -= 1;`
	`10`	`+ } else {`
	`11`	`+ rows += 1;`
	`12`	`+ }`
	`13`	`+ }`
	`14`	`+`
	`15`	`+ false`
	`16`	`+ }`
	`17`	`+}`

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