#include #include using namespace std;/ g_sumii 表示长度为 i 的总数 const int g_sumi7 = 0, 26, 325, 2600, 14950, 65780, 230230;/ 返回以 start 开头，长度为 len 的总数 int Sum(int start, int len) if (len = 1) return 1;int sum = 26 - start;for (int i = 26 - start - 1; i 26 - start - len + 1; i-) sum *= i; for (int i = len - 1; i 1; i-) sum /= i; return sum; inline int GetNum(char c) return c - a + 1; int GetResult(string s) int len = s.size(); int result = 0;/ 小于字符串长度的总数 for (int i = 1; i 6) cout z) cout num;for (int i = 0; i s;if (IsRight(s) cout 26 - len; i-) sum *= i; for (int i = len; i 1; i-) sum /= i; return sum; */