题解 | 序列中整数去重

#include <iostream>
using namespace std;
const int N = 1010;
int arr[N];
int main() {
    int n;
    cin >> n;
    int m;
    for(int i = 0;i < n;i++)
    {
        cin >> m;
        arr[m]++;
        if(arr[m] <= 1)
        cout << m << " ";
    }
    
}