def triangle(a, b, c):
    if (a+b) > c and (a+c) > b and (b+c) > a:
        return True
    else:
        return False


if __name__ == "__main__":
    print(triangle(3, 5, 4))    # True
    print(triangle(-1, 2, 3))   # False
    print(triangle(5, 9, 14))   # False
    print(triangle(30, 12, 29))  # True