题解 | #明明的随机数#

#include <iostream>
using namespace std;

int main() {
    int n, b;
    cin >> n;

    if (n <= 0 || n > 1000) {
        cerr << "Invalid input size." << endl;
        return 1;
    }

 
    int* a = new int[n];
    int c[1000] = {0};

    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }

    for (int i = 0; i < n; i++) {
        b = a[i];
        ++c[b];
    }

    for (int k = 0; k < 1000; k++) {
        if (c[k] != 0) {
            cout << k << endl;
        }
    }

    return 0;
}