#include <bits/stdc++.h>

#ifndef LOCAL_
#define fprintf if( false ) fprintf
#endif // LOCAL_
#define dumpi(x1) fprintf(stderr, "#%s.%d (%s) = (%d)\n", __func__, __LINE__, #x1, x1);
#define dumpii(x1, x2) fprintf(stderr, "#%s.%d (%s, %s) = (%d, %d)\n", __func__, __LINE__, #x1, #x2, x1, x2);
#define dumpl(x1) fprintf(stderr, "#%s.%d (%s) = (%ld)\n", __func__, __LINE__, #x1, x1);
#define dumpd(x1) fprintf(stderr, "#%s.%d (%s) = (%lf)\n", __func__, __LINE__, #x1, x1);

int n;
int xs[1123456];

int main() {
  scanf("%d", &n);
  for(int i = 0; i < n; ++i) {
    int a;
    scanf("%d", &a);
    xs[a] = 1;
  }

  int limit = sqrt(1123456);
  for(int i = 1; i < limit; ++i) {
    if( xs[i] == 0 ) continue;
    for(int j = i + i; j < 1123456; j+=i) {
      if( xs[j] != 0 ) xs[j] = std::max(xs[j], xs[i] + 1);
    }
  }
  int res = -1;
  for(int i = 0; i < 1123456; ++i) {
    // if( i < 100 ) dumpi(xs[i]);
    res = std::max(res, xs[i]);
  }
  printf("%d\n", res);

  return 0;
}