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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	long long n1, n2, n3, arr[1000000], k, count=0, n;
  7. 	cin>>n1>>n2>>n3; n=n1+n2+n3;
  8. 	for(int i=0; i<1000000; i++) arr[i]=0;
  9. 	while(n--) {cin>>k; arr[k]++;}
  10. 	for(int i=0; i<1000000; i++) if(arr[i]>1) count++;
  11. 	cout<<count<<endl;
  12. 	for(int i=0; i<1000000; i++) if(arr[i]>1) cout<<i<<endl;
  13. 	return 0;
  14. }
Success #stdin #stdout 0.01s 11032KB
comments ()
stdin
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2 3 1
-4 -2
-6 -4 -2
10
stdout
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0
https://ideone.com/Y5Wz76
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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