#include <iostream> #include <string> #include <cstdio> #include <cstring> using namespace std; int main(){ string a; cin>>a; char b[50]; int len=a.length(); int top=0; memset(b,'\0',sizeof(b)); for(int i=0;i<len;i++){ int cnt=1; for(int j=i+1;j<len;j++){ if(a[j]==a[i]){ cnt++; } } if(cnt==1){ b[top++]=a[i]; } } int len2=strlen(b); for(int i=0;i<len2;i++){ cout<<b[i]; } cout<<endl; return 0; } |
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