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- #include<iostream>
- #include<vector>
- #include <set>
- #include <map>
- using namespace std;
- int main() {
- int n;
- vector<int>v(n);
- v.front(); v.back(); v.begin(); v.end(); v.rbegin(); v.rend();
- v.assign(5, 1); //11111
- v.empty();v.size();v.clear();
- v.erase(v.begin+3); // 11_11
- v.pop_back();
- set<int>s;
- s.insert(1);
- s.count(1);
- s.erase(1);
- map<int, int> m;
- m[1] = 11;
- m.count(1);
- }
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