#include<iostream> #include<map> using namespace std; class MyCmp { public: bool operator() (int a, int b) const { return a > b; } }; template<typename T> void PrintMap(T &container) { for(auto it = container.begin(); it != container.end(); it++) { cout<<it->first<<" "<<it->second<<endl; } } void PrintOkPoint(map<int,int, MyCmp> &map0) { map<int,int> map1; auto it = map0.begin(); int maxX = it->second; map1[it->second] = it->first; for(it++; it != map0.end(); it++) { if(it->second > maxX) { maxX = it->second; map1[it->second] = it->first; } } PrintMap(map1); } int main() { int n,x,y; map<int,int,MyCmp> map0; cin>>n; if(n == 0) return 0; while(n--) { cin>>x>>y; map0[y] = x; } PrintOkPoint(map0); return 0; }