#include <iostream>
#include <vector>
#include <algorithm>
 
using namespace std;
 
int main() {
 
	std::vector<int> tt { 15, 25 };
	std::vector<int> cc  { 10, 20, 30 } ;
 
	auto lower = std::lower_bound(cc.begin(), cc.end(), tt.front(), [](int a, int b){ return a < b; });
	auto upper = std::lower_bound(cc.rbegin(), cc.rend(), tt.back(), [](int a, int b){ return a > b; });
 
	size_t beforeCount = lower - cc.begin();
	size_t afterCount = upper - cc.rbegin();
 
	std::cout << beforeCount << std::endl;
	std::cout << afterCount << std::endl;
 
	std::cout << cc[beforeCount] << std::endl;
	std::cout << cc[afterCount] << std::endl;
 
	return 0;
}

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