implement sqrt function about instaswap HOT 2 CLOSED

// Define the sqrt function using the Babylonian method
function sqrt(uint y) internal pure returns (uint z) {
    if (y > 3) {
        // Initialize z to y
        z = y;

        // Divide y by 2 and add 1 to get the first estimate, x
        uint x = y / 2 + 1;

        // Iterate until convergence
        while (x < z) {
            // Set z = x
            z = x;

            // Calculate the next estimate, x
            x = (y / x + x) / 2;
        }
    } else if (y != 0) {
        // If y <= 3, set z = 1
        z = 1;
    }

    // Create a new Cairo context for drawing
    cairo_t* cr = cairo_create(surface);

    // Draw the square root symbol using Cairo
    cairo_move_to(cr, 0, 0);
    cairo_line_to(cr, 10, 10);
    cairo_line_to(cr, 20, 0);
    cairo_stroke(cr);

    // Clean up the Cairo context
    cairo_destroy(cr);
}