add: leetcode 0488 solution

leetcode/0488.Zuma-Game/488.Zuma Game.go

@@ -0,0 +1,50 @@
+package leetcode
+
+func findMinStep(board string, hand string) int {
+	q := [][]string{{board, hand}}
+	mp := make(map[string]bool)
+	minStep := 0
+	for len(q) > 0 {
+		length := len(q)
+		minStep++
+		for length > 0 {
+			length--
+			cur := q[0]
+			q = q[1:]
+			curB, curH := cur[0], cur[1]
+			for i := 0; i < len(curB); i++ {
+				for j := 0; j < len(curH); j++ {
+					curB2 := del3(curB[0:i] + string(curH[j]) + curB[i:])
+					curH2 := curH[0:j] + curH[j+1:]
+					if len(curB2) == 0 {
+						return minStep
+					}
+					if _, ok := mp[curB2+curH2]; ok {
+						continue
+					}
+					mp[curB2+curH2] = true
+					q = append(q, []string{curB2, curH2})
+				}
+			}
+		}
+	}
+	return -1
+}
+
+func del3(str string) string {
+	cnt := 1
+	for i := 1; i < len(str); i++ {
+		if str[i] == str[i-1] {
+			cnt++
+		} else {
+			if cnt >= 3 {
+				return del3(str[0:i-cnt] + str[i:])
+			}
+			cnt = 1
+		}
+	}
+	if cnt >= 3 {
+		return str[0 : len(str)-cnt]
+	}
+	return str
+}