#include <math.h>
#include <stdio.h>
#define V 30000

int main(void)
{
    float x[V];
    int i;
    int counter = 0;


    x[0] = -0.5;


    for (i = 0; i < V; i++)
    {
        x[i + 1] = (x[i] + (40/30)*x[i] - (90/120) - (10/3)*sin(x[i]));

        counter++;

        if (fabs(x[i + 1] - x[i]) <= 0.00001)
            break;
    }

    for (i = 0; i < counter + 1; i++)
    {
        printf("%d  %f\n", i, x[i]);
    }
    getchar();
    getchar();

    return 0;



}