题解 | #提取不重复的整数#
提取不重复的整数
https://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
#include<bits/stdc++.h>
using namespace std;
int main() {
int nums;
cin >> nums;
string str = to_string(nums);
unordered_set<char> set;
reverse(str.begin(), str.end());
string res;
for(char c : str)
if(set.count(c) != 1) {
res += c;
set.insert(c);
}
cout << stoi(res) << endl;
return 0;
}