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Commit 30fa1c3

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committed
feat: sliding window for 76 min window
1 parent 27171d9 commit 30fa1c3

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3 files changed

+104
-0
lines changed

3 files changed

+104
-0
lines changed

‎src/76_minWindow/algo.go

Lines changed: 70 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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package algo
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import "fmt"
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func minWindow(s string, t string) string {
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if len(s) < len(t) {
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return ""
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}
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need := map[byte]int{}
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for i := 0; i < len(t); i++ {
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need[t[i]] = need[t[i]] + 1
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}
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i := 0
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j := 0
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matchCount := 0
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result := ""
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for j < len(s) {
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// for match the condition
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for j < len(s) {
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c := s[j]
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if num, ok := count[c]; ok {
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if num == 0 {
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matchCount++
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}
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count[c] = num + 1
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}
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if matchCount != len(t) {
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j++
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} else {
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break
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}
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}
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if matchCount != len(t) {
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fmt.Println(i, j, matchCount, count)
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break
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}
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left:
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for i < len(s) {
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result = getMinSubstring(result, s, i, j+1)
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c := s[i]
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i++
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if num, ok := count[c]; ok {
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count[c] = num - 1
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if num == 1 {
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matchCount--
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break left
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}
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}
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}
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j++
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}
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return result
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}
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func getMinSubstring(result, newString string, startIdx, endIdx int) string {
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if len(newString) < endIdx {
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endIdx = len(newString)
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}
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newString = newString[startIdx:endIdx]
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if result != "" {
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if len(result) < len(newString) {
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return result
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} else {
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return newString
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}
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}
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return newString
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}

‎src/76_minWindow/algo_test.go

Lines changed: 31 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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package algo
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import (
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"fmt"
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"testing"
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)
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func TestMinWindow1(t *testing.T) {
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actual := minWindow("ADOBECODEBANC", "ABC")
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fmt.Println("actual: ", actual)
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}
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// ADOBEC, 0,5
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// DOBEC, 1, 5
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// DOBECODEBA, 1,10, [1, 2, 1]
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// ODEBA,
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func TestMinWindow2(t *testing.T) {
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actual := minWindow("a", "a")
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fmt.Println("actual: ", actual)
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}
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func TestMinWindow3(t *testing.T) {
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actual := minWindow("a", "aa")
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fmt.Println("actual: ", actual)
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}
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func TestMinWindow4(t *testing.T) {
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actual := minWindow("aa", "aa")
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fmt.Println("actual: ", actual)
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}

‎src/76_minWindow/go.mod

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,3 @@
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module algo
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go 1.18

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