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