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Merge pull requestneetcode-gh#1080 from MaratKhakim/787-Cheapest-Fl-kt

Kotlin: 787. Cheapest Flights within K stops

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	`1`	`+classSolution {`
	`2`	`+funfindCheapestPrice(n:Int,flights:Array<IntArray>,src:Int,dst:Int,k:Int):Int {`
	`3`	`+var cost=IntArray(n){Int.MAX_VALUE }`
	`4`	`+ cost[src]=0`
	`5`	`+`
	`6`	`+for (iin0..k) {`
	`7`	`+val temp= cost.clone()`
	`8`	`+`
	`9`	`+for (flightin flights) {`
	`10`	`+val (u, v, w)= flight`
	`11`	`+`
	`12`	`+if (cost[u]!=Int.MAX_VALUE)`
	`13`	`+ temp[v]=Math.min(temp[v], cost[u]+ w)`
	`14`	`+ }`
	`15`	`+`
	`16`	`+ cost= temp`
	`17`	`+ }`
	`18`	`+`
	`19`	`+returnif (cost[dst]==Int.MAX_VALUE)-1else cost[dst]`
	`20`	`+ }`
	`21`	`+}`

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