#include <algorithm>
#include <iostream>
#include <vector>

int main() {
    const std::vector<int> values{3, 1, 4, 1, 5};
    const auto found = std::find(values.begin(), values.end(), 4);
    if (found != values.end()) {
        std::cout << *found << '\n';
    }
    const auto missing = std::find(values.begin(), values.end(), 9);
    std::cout << (missing == values.end()) << '\n';
    const std::vector<int> empty{};
    std::cout << (std::find(empty.begin(), empty.end(), 4) == empty.end()) << '\n';
    return 0;
}