#include <stdio.h>
#include <math.h>

int main() {

    int operation_counter = 0;

    int n;

    printf("Input n (must be a natural number): ");
    scanf("%d", &n);

    double result = 0;

    operation_counter += 1;  // result = 0

    operation_counter += 2; // for loop
    for (int i = 1; i <= n; i++)
    {
        double denominator = 1;
        operation_counter += 1; // denominator = 1

        operation_counter += 2; // for loop
        for (int j = 1; j <= i; j++)
        {
            denominator *= j + cos(j);
            operation_counter += 5; // denominator *= j + cos(j), j <= i, j++
        }

        double power_of_four = 1;
        operation_counter += 1; // power_of_four = 1

        operation_counter += 2; // for loop
        for (int k = 1; k <= i; k++)
        {
            power_of_four *= 4;
            operation_counter += 3; // power_of_four *= 4, k <= i, k++
        }

        result += (power_of_four - i) / denominator;

        operation_counter += 5; // result += (power_of_four - i) / denominator, i <= n, i++
    }

    printf("Result = %.7f\n", result);
    printf("Number of operations = %d\n", operation_counter);

    return 0;
}