#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main()
{
    int original_input_value;
    float input_value;
    float factor = 1.0;
    float result = 0;
    char* input = malloc(10);

    printf("What is the input value?\n");
    scanf("%d", &original_input_value);

    input_value = original_input_value;

    if (input_value < 500) {
        result = input_value * factor;
        printf("Does feature sn apply on this input?\n");
        scanf("%s", input);

        if (strcmp(input, "y") == 0) {
            result = input_value * 0.05;
            printf("%f", result);
        } else if (strcmp(input, "n") == 0) {
            printf("%f", result);
        }
    } else {
        input_value -= 500;
        result += 500;
        input_value *= factor;

        if (input_value < 700) {
            input_value *= 0.8*factor;
        }

        while (input_value >= 700) {

            factor *= 0.8;
            result += 700*factor;
            factor *= 0.8;
            input_value -= 700;
        }

        result += factor*input_value;
        input_value *= factor;

        printf("Does feature sn apply on this input?\n");
        scanf("%s", input);


        if (strcmp(input, "y") == 0) {
            result = result + original_input_value * 0.05;
            printf("%f", result);
        } else if (strcmp(input, "n") == 0) {
            printf("%f", result);
        }
    }

    return 0;
}