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- void insert(set<int> &s,int x)
- {
- s.insert(x);
- }
- void print_contents(set<int> &s)
- {
- for(auto u:s) cout<<u<<" ";
- }
- void erase(set<int> &s,int x)
- {
- s.erase(x);
- }
- int find(set<int> &s,int x)
- {
- if(s.count(x)) return 1;
- else return -1;
- }
- int size(set<int> &s)
- {
- return s.size();
- }
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