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Add 695-Max Area of Island.js

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Original file line number	Diff line number	Diff line change
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	`1`	`+varmaxAreaOfIsland=function(grid){`
	`2`	`+functionfind(x,y){`
	`3`	`+if(grid[y]===undefined\|\|grid[y][x]===undefined){`
	`4`	`+return0;`
	`5`	`+}`
	`6`	`+`
	`7`	`+if(grid[y][x]===0){`
	`8`	`+return0;`
	`9`	`+}`
	`10`	`+`
	`11`	`+grid[y][x]=0;`
	`12`	`+`
	`13`	`+letsquare=1;`
	`14`	`+`
	`15`	`+square+=find(x+1,y);`
	`16`	`+square+=find(x-1,y);`
	`17`	`+square+=find(x,y+1);`
	`18`	`+square+=find(x,y-1);`
	`19`	`+`
	`20`	`+returnsquare;`
	`21`	`+}`
	`22`	`+`
	`23`	`+letmax=0;`
	`24`	`+`
	`25`	`+for(lety=0;y<grid.length;y++){`
	`26`	`+for(letx=0;x<grid[0].length;x++){`
	`27`	`+max=Math.max(max,find(x,y));`
	`28`	`+}`
	`29`	`+}`
	`30`	`+`
	`31`	`+returnmax;`
	`32`	`+};`

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