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Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -5,7 +5,7 @@ import "testing"`
`5`	`5`	`func TestAddAndSearchWord(t *testing.T) {`
`6`	`6`	`obj := Constructor()`
`7`	`7`
`8`		`- for _, word := range []string{"bad", "dad", "mad"}{`
	`8`	`+ for _, word := range []string{"bad", "dad", "mad"}{`
`9`	`9`	`obj.AddWord(word)`
`10`	`10`	`}`
`11`	`11`

Lines changed: 35 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,35 @@`
	`1`	`+/*`
	`2`	`+304. Range Sum Query 2D - Immutable`
	`3`	`+https://leetcode.com/problems/range-sum-query-2d-immutable/`
	`4`	`+*/`
	`5`	`+// 2019年02月27日`
	`6`	`+`
	`7`	`+package rsq`
	`8`	`+`
	`9`	`+// NumMatrix 累计区域和的数组`
	`10`	`+type NumMatrix struct {`
	`11`	`+ dp [][]int`
	`12`	`+}`
	`13`	`+`
	`14`	`+// Constructor 初始化构造函数`
	`15`	`+func Constructor(matrix [][]int) NumMatrix {`
	`16`	`+ if len(matrix) == 0 \|\| len(matrix[0]) == 0 {`
	`17`	`+ return NumMatrix{}`
	`18`	`+ }`
	`19`	`+ numMatrix := NumMatrix{dp: make([][]int, len(matrix)+1)}`
	`20`	`+ for i := 0; i < len(numMatrix.dp); i++ {`
	`21`	`+ numMatrix.dp[i] = make([]int, len(matrix[0])+1)`
	`22`	`+ }`
	`23`	`+`
	`24`	`+ for i := 1; i <= len(matrix); i++ {`
	`25`	`+ for j := 1; j <= len(matrix[0]); j++ {`
	`26`	`+ numMatrix.dp[i][j] = numMatrix.dp[i-1][j] + numMatrix.dp[i][j-1] - numMatrix.dp[i-1][j-1] + matrix[i-1][j-1]`
	`27`	`+ }`
	`28`	`+ }`
	`29`	`+ return numMatrix`
	`30`	`+}`
	`31`	`+`
	`32`	`+// SumRegion 求区域和`
	`33`	`+func (nm *NumMatrix) SumRegion(row1 int, col1 int, row2 int, col2 int) int {`
	`34`	`+ return nm.dp[row2+1][col2+1] - nm.dp[row1][col2+1] - nm.dp[row2+1][col1] + nm.dp[row1][col1]`
	`35`	`+}`

Lines changed: 35 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,35 @@`
	`1`	`+package rsq`
	`2`	`+`
	`3`	`+import "testing"`
	`4`	`+`
	`5`	`+func TestSunRegion(t *testing.T) {`
	`6`	`+ matrix := [][]int{`
	`7`	`+ {3, 0, 1, 4, 2},`
	`8`	`+ {5, 6, 3, 2, 1},`
	`9`	`+ {1, 2, 0, 1, 5},`
	`10`	`+ {4, 1, 0, 1, 7},`
	`11`	`+ {1, 0, 3, 0, 5},`
	`12`	`+ }`
	`13`	`+`
	`14`	`+ obj := Constructor(matrix)`
	`15`	`+`
	`16`	`+ testData := [][]int{`
	`17`	`+ {2, 1, 4, 3},`
	`18`	`+ {1, 1, 2, 2},`
	`19`	`+ {1, 2, 2, 4},`
	`20`	`+ }`
	`21`	`+ expected := []int{8, 11, 12}`
	`22`	`+`
	`23`	`+ for index, data := range testData {`
	`24`	`+ if res := obj.SumRegion(data[0], data[1], data[2], data[3]); res != expected[index] {`
	`25`	`+ t.Errorf("expected %d, got %d", expected[index], res)`
	`26`	`+ }`
	`27`	`+ }`
	`28`	`+`
	`29`	`+ if res := Constructor([][]int{}); res.dp != nil {`
	`30`	`+ t.Errorf("expected nil, got %v", res.dp)`
	`31`	`+ }`
	`32`	`+ if res := Constructor(make([][]int, 3)); res.dp != nil {`
	`33`	`+ t.Errorf("expected nil, got %v", res.dp)`
	`34`	`+ }`
	`35`	`+}`

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