20201126

20201126/main.go

@@ -0,0 +1,74 @@
+package main
+
+func main() {
+
+}
+
+func findMaxSubLen(src string) int {
+	l := 0
+	r := 0
+	max := 0
+	sm := make(map[uint8]struct{})
+	for {
+		if l == len(src) {
+			return max
+		}
+		for {
+			if r == len(src) {
+				return max
+			}
+			c := src[r]
+			if _, found := sm[c]; found {
+				sm = make(map[uint8]struct{})
+				l++
+				r = l
+				break
+			} else {
+				sm[c] = struct{}{}
+				if len(sm) > max {
+					max = len(sm)
+				}
+				r++
+			}
+		}
+	}
+}
+
+func findMaxSubLen2(src string) int {
+	l := 0
+	r := 0
+	max := 0
+	var ss []uint8
+	for {
+		if l == len(src) {
+			return max
+		}
+		for {
+			if r == len(src) {
+				return max
+			}
+			c := src[r]
+			if i := indexOfValue(c, ss); i != -1 {
+				ss = ss[i:]
+				l += i + 1
+				r++
+				break
+			} else {
+				ss = append(ss, c)
+				if len(ss) > max {
+					max = len(ss)
+				}
+				r++
+			}
+		}
+	}
+}
+
+func indexOfValue(n uint8, src []uint8) int {
+	for i := len(src) - 1; i >= 0; i-- {
+		if src[i] == n {
+			return i
+		}
+	}
+	return -1
+}