#include <iostream> #include <vector> #include <algorithm> using namespace std; bool less_than_10(int value) { return value < 10; } int main() { vector<int> numbers = {1, 7, 3, 5, 9, 2}; if (all_of(numbers.begin(), numbers.end(), less_than_10)) { cout << "All of the numbers are less than 10"; } else { cout << "Some numbers are not less than 10"; } return 0; }