#include <cstdio>
#include <cstdint>
#include <string>

std::string nyan(int i, int j) {
  std::string res(i, '3');
  for (int k = 0; k < i; ++k)
    if (j >> k & 1)
      res[i-k-1] = '5';

  return res;
}

int main() {
  int N;
  scanf("%d", &N);

  for (int i = 3; true; ++i) {
    for (int j = 0; j < (1 << i); ++j) {
      if (!(j & 1)) continue;
      if (__builtin_popcount(j) % 3 != 0) continue;
      if (--N == 0)
        return !printf("%s\n", nyan(i, j).c_str());
    }
  }
}