Submission #62515218

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#include<bits/stdc++.h>
using namespace std;
bool a[1010];
int main()
{
  int n, m;
  cin>>n>>m;
  for(int i=0;i<m;i++){
    int x;
    cin>>x;
    a[x]=true;
  }
  int cnt=0;
  for(int i=1;i<=n;i++) {
    if(!a[i]) {
      cnt++;
    }
  }
  if(cnt==0) cout<<0<<"\n";
  else {
    cout<<cnt<<"\n";
 
 
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#include<bits/stdc++.h>
using namespace std;
bool a[1010];
int main()
{
	int n, m;
	cin>>n>>m;
	for(int i=0;i<m;i++){
		int x;
		cin>>x;
		a[x]=true;
	}
	int cnt=0;
	for(int i=1;i<=n;i++) {
		if(!a[i]) {
			cnt++;
		}
	}
	if(cnt==0) cout<<0<<"\n";
	else {
		cout<<cnt<<"\n";
		for(int i=1;i<=n;i++) {
		if(!a[i]) {
			cout<<i<<" ";
		}
	}
	}
	
	return 0;
}

Submission Info

Judge Result