Commit 53cb78e

author

Shuo

authored

Add: 132 Pattern

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Lines changed: 15 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,16 @@`
`1`	`1`	`package p_132_pattern`
	`2`	`+`
	`3`	`+func find132pattern(nums []int) bool {`
	`4`	`+ ak, ajStack := -1<<31, make([]int, 0, len(nums))`
	`5`	`+ for i := len(nums) - 1; 0 <= i; i-- {`
	`6`	`+ if nums[i] < ak {`
	`7`	`+ return true`
	`8`	`+ }`
	`9`	`+ for len(ajStack) > 0 && ajStack[len(ajStack)-1] < nums[i] {`
	`10`	`+ ak = ajStack[len(ajStack)-1]`
	`11`	`+ ajStack = ajStack[:len(ajStack)-1]`
	`12`	`+ }`
	`13`	`+ ajStack = append(ajStack, nums[i])`
	`14`	`+ }`
	`15`	`+ return false`
	`16`	`+}`

Lines changed: 30 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -1 +1,31 @@`
`1`	`1`	`package p_132_pattern`
	`2`	`+`
	`3`	`+import "testing"`
	`4`	`+`
	`5`	`+type caseType struct {`
	`6`	`+ input []int`
	`7`	`+ expected bool`
	`8`	`+}`
	`9`	`+`
	`10`	`+func TestFind132pattern(t *testing.T) {`
	`11`	`+ tests := [...]caseType{`
	`12`	`+ {`
	`13`	`+ input: []int{1, 2, 3, 4},`
	`14`	`+ expected: false,`
	`15`	`+ },`
	`16`	`+ {`
	`17`	`+ input: []int{3, 1, 4, 2},`
	`18`	`+ expected: true,`
	`19`	`+ },`
	`20`	`+ {`
	`21`	`+ input: []int{-1, 3, 2, 0},`
	`22`	`+ expected: true,`
	`23`	`+ },`
	`24`	`+ }`
	`25`	`+ for _, tc := range tests {`
	`26`	`+ output := find132pattern(tc.input)`
	`27`	`+ if output != tc.expected {`
	`28`	`+ t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)`
	`29`	`+ }`
	`30`	`+ }`
	`31`	`+}`

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