add new solutions

solutions/22/q2273/solution.go

@@ -0,0 +1,37 @@
+package q2273
+
+var buf = [26]int{}
+var bufZ = [26]int{}
+
+func isAnagram(a, b string) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	seen := buf[:]
+	copy(seen, bufZ[:])
+	for i := range len(a) {
+		c := a[i] - 'a'
+		seen[c]++
+	}
+	for i := range len(b) {
+		c := b[i] - 'a'
+		seen[c]--
+		if seen[c] < 0 {
+			return false
+		}
+	}
+	return true
+}
+
+func removeAnagrams(words []string) []string {
+	p := 0
+	for i := 1; i < len(words); i++ {
+		if !isAnagram(words[p], words[i]) {
+			p++
+			words[p] = words[i]
+		}
+	}
+	return words[:p+1]
+}
+
+var _ = removeAnagrams