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  1. #include <iostream>
  2. #include <set>
  3. #include <algorithm>
  4. using namespace std;
  5. struct node{
  6. 	int x;
  7. 	int y;
  8. };
  9. inline bool operator<(const node& a, const node& b){
  10.   	if(a.x!=b.x)
  11.   		return  a.x< b.x;
  12.   	else 
  13.   		return a.y<b.y;
  14. }
  15. multiset<node> mset;
  16. int main() {
  17. 	node b=node();
  18. 	b={1,2};
  19. 	mset.insert({1,2});
  20. 	mset.erase(b);
  21. 	cout<<mset.size()<<endl;
  22. 	cout<<b.y;
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/WKf0n7
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
secret

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