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- #include <iostream>
- #include <set>
- using namespace std;
- int main() {
- set<int> st = {1, 2};
- st.insert(4);
- st.insert(0);
- st.erase(0);
- st.erase(st.begin());
- for(int x: st) {
- cout << x << " ";
- }
- return 0;
- }
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