HUNAN UNIVERSITY ACM/ICPC Judge Online_Problem 10048_Common permutation
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Common permutation Time Limit: 1000ms, Special Time Limit:2500ms, Memory Limit:32768KB Total submit users: 418, Accepted users: 386 Problem 10048 : No special judgement Problem description Given two strings of lowercase letters, a and b, print the longest string x of lowercase letters such that there is a permutation of x that is a subsequence of a and there is a permutation of x that is a subsequence of b. Input Input consists of pairs of lines. The first line of a pair contains a and the second contains b. Each string is on a separate line and consists of at most 1,000 lowercase letters. Output For each subsequent pair of input lines, output a line containing x. If several x satisfy the criteria above, choose the first one in alphabetical order. Sample Input
prettywomenwalkingdownthestreetSample Output
enwetProblem Source UAL 1999
CODE
/* Name: 10048_Common permutation Copyright: yangchun's Author: yangchun Date: 22-06-08 19:38 Description: HUNAN UNIVERSITY ACM/ICPC Judge Online_Problem 10048_Common permutation*/#include <algorithm>#include <stdio.h>#include <time.h>using namespace std;int main(){ //freopen("in.txt","r",stdin); //freopen("out.txt","w",stdout); int i, j, len_a, len_b, ch_num[26] = {0}; char a[1001] = {'/0'}, b[1001] = {'/0'}, ch[27] = "abcdefghijklmnopqrstuvwxyz"; while(gets(a)!=NULL) { gets(b); len_a = strlen(a); len_b = strlen(b); for(i=0; i<len_a; i++) for(j=0; j<len_b; j++) { if(a[i] == b[j]) { b[j] -= b[j]-32; ch_num[a[i]-'a']++; break; } } for(i=0; i<26; i++) { if(ch_num[i] > 0) { for(j=0; j<ch_num[i]; j++) printf("%c",ch[i]); } } printf("/n"); memset(a,'/0',sizeof(a)); memset(b,'/0',sizeof(b)); memset(ch_num,0,sizeof(ch_num)); } // printf("time = %ld ms/n",clock()); return 0;}
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