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- #include<iostream>
- #include<vector>
- #include<map>
- using namespace std;
- int main()
- {
- int N;
- map<int, int> m;
- cin >> N;
- vector<int> cord(2);
- for(int i = 0; i < N; i++)
- {
- cin >> cord[0] >> cord[1];
- if(m.count(cord[0])==0)
- {
- m.insert({cord[0], cord[1]});
- }
- else
- {
- if(m[cord[0]]<cord[1])
- {
- m[cord[0]]=cord[1];
- }
- }
- }
- int h;
- for(map<int, int>::iterator it = m.begin(); it!=m.end(); it++)
- {
- h+=it->second;
- }
- cout << h;
- return 0;
- }
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