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wa得不行了~~~~~~~~~~~~~~~~~WHO CAN TELL ME WHY!~#include "stdio.h"
#include "string.h"
int main()
{
char a[10000],b[10000];
int i,flag1[26],flag2[26];
L1: while (gets(a))
{
if (a[0]=='\0') goto L1;
L2: gets(b);
if (b[0]=='\0') goto L2;
memset(flag1,0,sizeof(flag1));
memset(flag2,0,sizeof(flag2));
for (i=0;i<strlen(a);i++)
flag1[a[i]-97]=1;
for (i=0;i<strlen(b);i++)
flag2[b[i]-97]=1;
for (i=0;i<26;i++)
if (flag1[i]&&flag2[i]) printf("%c",i+97);
printf("\n");
}
return 0;
}
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