#include <iostream>
using namespace std;

int main() {
    float array[] = { 0.141573001, 0.129732453, 1.689353116, 1.445072308, 1.767702844, 1.967608838, 0.792822868, 1.836018189, 0.521325809, 1.242620743, 0.30556143, 1.45634, 1.340469519, 0.02216116, 0.030461417, 1.420794672, 0.700459128, 0.959538479, 0.716117771, 1.612446026};
    
    size_t count = 0;
    double sum = 0;
    for (float element : array) {
        if (0.0 <= element && element <= 0.5) {
            ++count;
            sum += element;
        }
    }
    double average = sum / count;
    return 0;
}