add new solutions

solutions/2/q205/solution.go

@@ -0,0 +1,26 @@
+package q205
+
+func isIsomorphic(s string, t string) bool {
+	if len(s) != len(t) {
+		return false
+	}
+
+	ab := make(map[byte]byte, 256)
+	ba := make(map[byte]byte, 256)
+	for i := range len(s) {
+		if b, ok := ab[s[i]]; ok {
+			if t[i] != b {
+				return false
+			}
+		} else {
+			if _, ok := ba[t[i]]; ok {
+				return false
+			}
+			ab[s[i]] = t[i]
+			ba[t[i]] = s[i]
+		}
+	}
+	return true
+}
+
+var _ = isIsomorphic