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

const int Mx = 1005;
int n;
float dt, arr[1005];

int main()
{
    FILE *fr = fopen("input.txt", "r");
    FILE *fw = fopen("output.txt", "w");
    if (fr == NULL)
    {
        fprintf (fw, "Invalid input");
    }

    fread (arr, sizeof(float), n, fr);
    if (n < 0 || n >= 1000 || dt <= 0 || dt >= 0.1)
    {
        fprintf (fw, "Invalid input");
    }
    else
    {
        float *arr = malloc(sizeof(float)*n);
        for (int i = 0; i < n; i++) {
            arr[i] = sinf(i * dt);
        }
        for (int i = n - 1; i >= 0; i--) {
            fprintf (fw, "%.4f", arr[i]);
        }
    }
}