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Commitaf22904

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Create 1095-find-in-mountain-array.kt
1 parent5f3d294 commitaf22904

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‎kotlin/1095-find-in-mountain-array.kt

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classSolution {
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funfindInMountainArray(target:Int,mountainArr:MountainArray):Int {
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var l=1
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var r= mountainArr.length()-2
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var peak=-1
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while (l<= r) {
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val m= (l+ r)/2
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val left= mountainArr.get(m-1)
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val mid= mountainArr.get(m)
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val right= mountainArr.get(m+1)
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if (left< mid&& mid< right) {
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l= m+1
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}elseif (left> mid&& mid> right) {
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r= m-1
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}else {
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peak= m
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break
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}
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}
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l=0
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r= peak
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while (l<= r) {
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val m= (l+ r)/2
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val value= mountainArr.get(m)
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if (value< target)
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l= m+1
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elseif (value> target)
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r= m-1
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else
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return m
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}
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l= peak
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r= mountainArr.length()-1
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while (l<= r) {
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val m= (l+ r)/2
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val value= mountainArr.get(m)
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if (value< target)
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r= m-1
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elseif (value> target)
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l= m+1
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else
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return m
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}
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return-1
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}
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}

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