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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int main(){
  4.     int a; cin>>a;
  5.     stack<int> b;
  6.     map<int,int> c;
  7.     for(int i=0;i<a;i++){
  8.         int x; cin>>x;
  9.         if(!c[x]){
  10.             b.push(x);
  11.             c[x]=1;
  12.         }
  13.     }
  14.     stack<int> d;
  15.     while(!b.empty()){
  16.         d.push(b.top());
  17.         b.pop();
  18.     }
  19.     while(!d.empty()){
  20.         cout<<d.top()<<" ";
  21.         d.pop();
  22.     }
  23. }
  24.  
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
8
7 -6 4 -6 7 1 2 -6
stdout 
7 -6 4 1 2
https://ideone.com/rx3zZP
language:
C++ (gcc 8.3)
created:
15 days ago
visibility:
public

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