#include <algorithm>
#include <vector>
#include <iostream>
 
int main ( )
{
	auto compare_first = [](std::pair<int, int> const & a, std::pair<int, int> const & b){
		return a.first < b.first;
	};
 
	auto compare_second = [](std::pair<int, int> const & a, std::pair<int, int> const & b){
		return a.second < b.second;
	};
 
	std::vector<std::pair<int, int>> values { {2,3}, {2,4}, {3,2}, {3,4}, {3,5} };
 
	std::pair<int, int> value { 2, 3 };
 
	auto it_c = std::upper_bound(values.begin(), values.end(), value, compare_first);
	auto it = std::upper_bound(it_c, values.end(), value, compare_second);
 
	std::cout << it->first << ',' << it->second;
}

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