#include <iostream> using namespace std; #include <vector> #include <algorithm> bool isxd(string s1, string s2) { int len1 = s1.length(), len2 = s2.length(); if (len1 != len2 || s1 == s2) { return false; } char c1[len1], c2[len1]; for (int i = 0; i < len1; i++) { c1[i] = s1[i]; ...