#!/usr/bin/env python3

def rgb_to_altitude(R, G, B, scale=0.1, offset=-10000):
    value = (R * 65536) + (G * 256) + B
    return value * scale + offset

if __name__ == "__main__":
    import sys
    if len(sys.argv) != 4:
        print("Uso: python3 rgb2alt.py R G B")
        sys.exit(1)

    R = int(sys.argv[1])
    G = int(sys.argv[2])
    B = int(sys.argv[3])

    alt = rgb_to_altitude(R, G, B)
    print(alt)