1050. String Subtraction (20)

Given two strings S₁ and S₂, S = S₁ - S₂ is defined to be the remaining string after taking all the characters in S₂ from S₁. Your task is simply to calculate S₁ - S₂ for any given strings. However, it might not be that simple to do it fast.

Input Specification:

Each input file contains one test case. Each case consists of two lines which gives S₁ and S₂, respectively. The string lengths of both strings are no more than 10⁴. It is guaranteed that all the characters are visible ASCII codes and white space, and a new line character signals the end of a string.

Output Specification:

For each test case, print S₁ - S₂ in one line.

Sample Input:

They are students.
aeiou

Sample Output:

Thy r stdnts.

#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int main(){
	char str[10002];
	char str1[10002];
	gets(str);
	gets(str1);
	int i,j;
	int len=strlen(str);
	int len1=strlen(str1);
	for(i=0;i<len;i++){
		char c=str[i];
		for(j=0;j<len1;j++){
			if(c==str1[j]){
				break;
			}
		}
		if(j==len1){
			printf("%c",c);
		}
	}
	printf("
");
	return 0;
}