O(N)
import math
import heapq
import itertools
from functools import reduce
# main
def main():
N = int(input())
x = (N + 9 - 1) // 9
y = N % 9
if y == 0:
y = 9
res = ""
for _ in range(0, x):
res += str(y)
print(res)
# エントリポイント
if __name__ == '__main__':
main()