题目:给你一个单词列表。再给你一些新的单词。输出列表中又一次排列能得到此新单词的词。
分析:字符串。对每一个字符串的字母排序生成新的传f(str)。总体排序,用二分来查找就可以。
说明:注意输出要满足字典序,先排序后查找。
#include <algorithm> #include <iostream> #include <cstdlib> #include <cstring> #include <cstdio> using namespace std; typedef struct wnode { char word[7]; char abcd[7]; }words; words W[101]; int cmp(words a, words b) { int c = strcmp(a.abcd, b.abcd); if (c != 0) return c<0; return strcmp(a.word, b.word)<0; } int bs(char str[], int r) { int l = 0,m,c; while (l < r) { m = (l+r)/2; c = strcmp(W[m].abcd, str); if (c < 0) l = m+1; else r = m; } return l; } char buf[7]; int main() { int count = 0; while (gets(W[count].word) && strcmp(W[count].word, "XXXXXX")) { strcpy(W[count].abcd, W[count].word); sort(W[count].abcd, W[count].abcd+strlen(W[count].abcd)); count ++; } sort(W, W+count, cmp); while (gets(buf) && strcmp(buf, "XXXXXX")) { sort(buf, buf+strlen(buf)); int s = bs(buf, count-1),flag = 0; while (!strcmp(buf, W[s].abcd)) { printf("%s ",W[s ++].word); flag = 1; } if (!flag) printf("NOT A VALID WORD "); printf("****** "); } return 0; }