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- #include <iostream>
- #include <set>
- using namespace std;
- int main() {
- set<int> st = {1, 2};
- st.insert(4);
- st.insert(0);
- set<int>::iterator it = st.find(2);
- if(it != st.end()) {
- cout << *it << endl;
- }
- if(st.count(0)) {
- cout << "Da postoi" << endl;
- }
- return 0;
- }
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