Commit 963cad7

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Add: Rotting Oranges

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Lines changed: 39 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,39 @@`
	`1`	`+package rotting_oranges`
	`2`	`+`
	`3`	`+func orangesRotting(grid [][]int) int {`
	`4`	`+ r, c := len(grid), len(grid[0])`
	`5`	`+ hasFresh, isRotten, rottens := false, false, make([]int, 0)`
	`6`	`+ for i := 0; i < r; i++ {`
	`7`	`+ for j := 0; j < c; j++ {`
	`8`	`+ if !hasFresh && grid[i][j] == 1 {`
	`9`	`+ hasFresh = true`
	`10`	`+ } else if grid[i][j] == 2 {`
	`11`	`+ rottens = append(rottens, i*c+j)`
	`12`	`+ }`
	`13`	`+ }`
	`14`	`+ }`
	`15`	`+ for _, p := range rottens {`
	`16`	`+ i, j := p/c, p%c`
	`17`	`+ for k := 0; k < 4; k++ {`
	`18`	`+ nr, nc := i+k-1, j+k-2`
	`19`	`+ if k == 0 {`
	`20`	`+ nc += 2`
	`21`	`+ } else if k == 3 {`
	`22`	`+ nr -= 2`
	`23`	`+ }`
	`24`	`+ if 0 <= nr && nr < r && 0 <= nc && nc < c && grid[nr][nc] == 1 {`
	`25`	`+ grid[nr][nc], isRotten = 2, true`
	`26`	`+ }`
	`27`	`+ }`
	`28`	`+ }`
	`29`	`+ if !hasFresh {`
	`30`	`+ return 0`
	`31`	`+ } else if !isRotten {`
	`32`	`+ return -1`
	`33`	`+ }`
	`34`	`+ ans := orangesRotting(grid)`
	`35`	`+ if ans == -1 {`
	`36`	`+ return -1`
	`37`	`+ }`
	`38`	`+ return ans + 1`
	`39`	`+}`

Lines changed: 47 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,47 @@`
	`1`	`+package rotting_oranges`
	`2`	`+`
	`3`	`+import "testing"`
	`4`	`+`
	`5`	`+type caseType struct {`
	`6`	`+ input [][]int`
	`7`	`+ expected int`
	`8`	`+}`
	`9`	`+`
	`10`	`+func TestOrangesRotting(t *testing.T) {`
	`11`	`+ tests := [...]caseType{`
	`12`	`+ {`
	`13`	`+ input: [][]int{`
	`14`	`+ {2, 1, 1},`
	`15`	`+ {1, 1, 0},`
	`16`	`+ {0, 1, 1},`
	`17`	`+ },`
	`18`	`+ expected: 4,`
	`19`	`+ },`
	`20`	`+ {`
	`21`	`+ input: [][]int{`
	`22`	`+ {2, 1, 1},`
	`23`	`+ {0, 1, 1},`
	`24`	`+ {1, 0, 1},`
	`25`	`+ },`
	`26`	`+ expected: -1,`
	`27`	`+ },`
	`28`	`+ {`
	`29`	`+ input: [][]int{`
	`30`	`+ {0, 2},`
	`31`	`+ },`
	`32`	`+ expected: 0,`
	`33`	`+ },`
	`34`	`+ {`
	`35`	`+ input: [][]int{`
	`36`	`+ {1, 2},`
	`37`	`+ },`
	`38`	`+ expected: 1,`
	`39`	`+ },`
	`40`	`+ }`
	`41`	`+ for _, tc := range tests {`
	`42`	`+ output := orangesRotting(tc.input)`
	`43`	`+ if output != tc.expected {`
	`44`	`+ t.Fatalf("input: %v, output: %v, expected: %v", tc.input, output, tc.expected)`
	`45`	`+ }`
	`46`	`+ }`
	`47`	`+}`

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