暴力美学

#include<bits/stdc++.h>
using namespace std;
const int N=1000010;
int a[N];
int main(void){
	int n,m,all=0,cmp=0;
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		scanf("%d",&a[i]);
		a[i]+=1; 
	}
	scanf("%d",&m);
	sort(a+1,a+n+1);

for(int j=1;j<=n+1;j++){ all++;

		if(a[j]!=a[j-1]){
			if(all>=m){
				cout<<a[j-1]-1<<' ';
				cmp++;
			}
			all=0;
		}
	}
	if(cmp==0){
		printf("-1");
	}
	return 0;
}