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refactor 1020

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`1`	`1`	`packagecom.fishercoder.solutions;`
`2`	`2`
`3`		`-/**`
`4`		`- * 1020. Number of Enclaves`
`5`		`- *`
`6`		`- * Given a 2D array A, each cell is 0 (representing sea) or 1 (representing land)`
`7`		`- *`
`8`		`- * A move consists of walking from one land square 4-directionally to another land square, or off the boundary of the grid.`
`9`		`- *`
`10`		`- * Return the number of land squares in the grid for which we cannot walk off the boundary of the grid in any number of moves.`
`11`		`- */`
`12`		`-`
`13`	`3`	`publicclass_1020 {`
`14`	`4`	`publicstaticclassSolution1 {`
`15`	`5`	`publicvoidwalk(int[][]A,boolean[][]visited,intx,inty) {`

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