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Create 2013-detect-squares.swift

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	`1`	`+`
	`2`	`+classDetectSquares{`
	`3`	`+`
	`4`	`+varpts=[[Int]]()`
	`5`	`+varptsCount=[[Int]: Int]()`
	`6`	`+`
	`7`	`+init(){`
	`8`	`+`
	`9`	`+}`
	`10`	`+`
	`11`	`+func add(_ point:[Int]){`
	`12`	`+ptsCount[point, default:0]+=1`
	`13`	`+ pts.append(point)`
	`14`	`+}`
	`15`	`+`
	`16`	`+func count(_ point:[Int])->Int{`
	`17`	`+varres=0`
	`18`	`+varx=point[0],y=point[1]`
	`19`	`+forvalin pts{`
	`20`	`+letpx=val[0],py=val[1]`
	`21`	`+ifabs(py- y)!=abs(px- x) \|\| x== px \|\| y== py{`
	`22`	`+continue`
	`23`	`+}`
	`24`	`+ res+=ptsCount[[x, py], default:0]* ptsCount[[px, y], default:0]`
	`25`	`+}`
	`26`	`+return res`
	`27`	`+}`
	`28`	`+}`
	`29`	`+`
	`30`	`+/**`
	`31`	`+ * Your DetectSquares object will be instantiated and called as such:`
	`32`	`+ * let obj = DetectSquares()`
	`33`	`+ * obj.add(point)`
	`34`	`+ * let ret_2: Int = obj.count(point)`
	`35`	`+ */`

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