from sys import argv, exit

try:
    input_ = int(argv[1])
except IndexError:
    print(f"Usage: {argv[0]} [input]")
    exit(1)

recipes = [3, 7]
a, b = 0, 1

def print_recipes():
    for i, recipe in enumerate(recipes):
        if i == a:
            print(f"({recipe:>2d})", end=" ")
        elif i == b:
            print(f"[{recipe:>2d}]", end=" ")
        else:
            print(f" {recipe:>2d} ", end=" ")
    print()

target = None
i = 0
while len(recipes) < input_ + 10:
    # print_recipes()
    next_ = recipes[a] + recipes[b]

    digits = []
    if next_ == 0:
        digits.append(0)
    else:
        while next_:
            digits.append(next_ % 10)
            next_ //= 10

    recipes.extend(digits[::-1])

    a = (a + recipes[a] + 1) % len(recipes)
    b = (b + recipes[b] + 1) % len(recipes)

# print_recipes()
output = recipes[input_:input_ + 10]
assert len(output) == 10
print("".join(str(x) for x in output))