版权声明:Nicolas https://blog.csdn.net/qq_42835910/article/details/86655870
题目:http://lx.lanqiao.cn/problem.page?gpid=T413
#include <iostream>
#include <string>
#include <map>
using namespace std;
void DelPack(string s){
map<char,int> m;
for(int i=0; i<s.length(); i++) m[s[i]]++;
for(int i=0; i<s.length(); i++)
if(m[s[i]]==1) cout<<s[i];
}
int main(int argc, char** argv) {
string s;
cin>> s;
DelPack(s);
return 0;
}