365 Days of Code - Day 068

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// Search Space Bounds
int x_lower = 0;
int x_upper = W - 1;
int y_lower = 0;
int y_upper = H - 1;

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case 0: // U
{
    x_lower = X0;
    x_upper = X0;
    y_upper = Y0 - 1;

    Y0 = midpoint(y_lower, y_upper);
    fprintf(stderr, "X0: %d, Y0: %d", X0, Y0);
    break;
}

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case 1: // UR
{
    x_lower = X0 + 1;
    y_upper = Y0 - 1;

    X0 = midpoint_ceil(x_lower, x_upper);
    Y0 = midpoint(y_lower, y_upper);
    break;
}

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

/**
 * Calculates the midpoint between two numbers
 */
int midpoint(int num1, int num2)
{
    return (num1 + num2) / 2;
}

int main()
{
    int W, H, N, X0, Y0;
    scanf("%d%d%d%d%d", &W, &H, &N, &X0, &Y0);
    fprintf(stderr, "W: %d\nH: %d\nN: %d\nX0: %d\nY0: %d\n", W, H, N, X0, Y0);

    // Search Space Bounds
    int x_lower = 0;
    int x_upper = W - 1;
    int y_lower = 0;
    int y_upper = H - 1;

    while (1)
    {
        // The direction of the bombs from batman's current location
        // (U, UR, R, DR, D, DL, L or UL)
        char bomb_dir[4] = "";
        scanf("%s", bomb_dir);
        fprintf(stderr, "S: %s\n", bomb_dir);
        int bomb_dir_enum = -1;
        if      (strcmp("U",  bomb_dir) == 0) bomb_dir_enum = 0;
        else if (strcmp("UR", bomb_dir) == 0) bomb_dir_enum = 1;
        else if (strcmp("R",  bomb_dir) == 0) bomb_dir_enum = 2;
        else if (strcmp("DR", bomb_dir) == 0) bomb_dir_enum = 3;
        else if (strcmp("D",  bomb_dir) == 0) bomb_dir_enum = 4;
        else if (strcmp("DL", bomb_dir) == 0) bomb_dir_enum = 5;
        else if (strcmp("L",  bomb_dir) == 0) bomb_dir_enum = 6;
        else if (strcmp("UL", bomb_dir) == 0) bomb_dir_enum = 7;
        else
        {
            fprintf(stderr, "Unknown direction");
            return 1;
        }
        fprintf(stderr, "E: %d\n", bomb_dir_enum);


        switch(bomb_dir_enum)
        {
            case 0: // U
            {
                x_lower = X0;
                x_upper = X0;
                y_upper = Y0 - 1;

                Y0 = midpoint(y_lower, y_upper);
                break;
            }
            case 1: // UR
            {
                x_lower = X0 + 1;
                y_upper = Y0 - 1;

                X0 = midpoint(x_lower, x_upper);
                Y0 = midpoint(y_lower, y_upper);
                break;
            }
            case 2: // R
            {
                x_lower = X0 + 1;
                y_lower = Y0;
                y_upper = Y0;

                X0 = midpoint(x_lower, x_upper);
                break;
            }
            case 3: // DR
            {
                x_lower = X0 + 1;
                y_lower = Y0 + 1;

                X0 = midpoint(x_lower, x_upper);
                Y0 = midpoint(y_lower, y_upper);
                break;
            }
            case 4: // D
            {
                x_lower = X0;
                x_upper = X0;
                y_lower = Y0 + 1;

                Y0 = midpoint(y_lower, y_upper);
                break;
            }
            case 5: // DL
            {
                x_upper = X0 - 1;
                y_lower = Y0 + 1;

                X0 = midpoint(x_lower, x_upper);
                Y0 = midpoint(y_lower, y_upper);
                break;
            }
            case 6: // L
            {
                x_upper = X0 - 1;
                y_lower = Y0;
                y_upper = Y0;

                X0 = midpoint(x_lower, x_upper);
                break;
            }
            case 7: // UL
            {
                x_upper = X0 - 1;
                y_upper = Y0 - 1;

                X0 = midpoint(x_lower, x_upper);
                Y0 = midpoint(y_lower, y_upper);
                break;
            }
            default:
            {
                break;
            }
        }
        fprintf(stderr, "X0: %d, Y0: %d", X0, Y0);
        printf("%d %d\n", X0, Y0);
    }

    return 0;
}