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- #include<iostream>
- using namespace std;
- int n;
- int a[1000];
- void input() {
- cin >> n;
- for(int i = 0; i < n; i++)
- cin >> a[i];
- }
- bool NotInArray(int t, int b[100], int m ) {
- for(int i = 0; i < m; i++) {
- if(t==b[i])
- return false;
- }
- return true;
- }
- int dem(int x) {
- int dem = 0;
- for(int i = 0; i < n; i++)
- if(a[i] == x)
- dem++;
- return dem;
- }
- void output() {
- int b[100];
- int m = 0;
- int d = 0;
- for(int i = 0; i < n; i++) {
- if(NotInArray(a[i], b, m) && dem(a[i]) > 1) {
- d++;
- b[m++] = a[i];
- }
- }
- for(int i = 0; i < m; i++)
- cout << b[i] << " ";
- if(d==0)
- cout << "0";
- }
- int main() {
- input();
- output();
- }
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