Problem p02642 (python)

Fixed submission:
import sys
input = sys.stdin.readline
import math

n = map(int, input())
a = list(map(int, input().split()))
N = 1000005
b = [0] * N

for x in a:
    if b[x] == 0:
        for y in list(range(2 * x, N, x)):
            b[y] += 1
    b[x] += 1

ans = 0
for x in a:
    if b[x] == 1:
        ans += 1
print(ans)

Buggy submission (verdict: Runtime Error):
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define F first
#define S second
#define pii pair<int, int>
#define pli pair<ll, int>
#define pil pair<int, ll>
#define pll pair<ll, ll>
#define eb emplace_back
#define all(v) v.begin(), v.end()
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep3(i, l, n) for (int i = l; i < (n); ++i)
#define sz(v) (int)v.size()
#define endl '\n'
const int inf = 1000000007;
const ll INF = 1e18;
int mod = 998244353;
// int mod = 1000000007;
#define abs(x) (x >= 0 ? x : -(x))
#define lb(v, x) (int)(lower_bound(all(v), x) - v.begin())
#define ub(v, x) (int)(upper_bound(all(v), x) - v.begin())
template<typename T1, typename T2> inline bool chmin(T1 &a, T2 b) { if (a > b) { a = b; return 1; } return 0; }
template<typename T1, typename T2> inline bool chmax(T1 &a, T2 b) { if (a < b) { a = b; return 1; } return 0; }
ll gcd(ll a, ll b) { if (b == 0) return a; return gcd(b, a % b); }
ll lcm(ll a, ll b) { return a / gcd(a, b) * b; }
template<typename T, typename U> T pow_(T a, U b) { return b ? pow_(a * a, b / 2) * (b % 2 ? a : 1) : 1; }
ll modpow(ll a, ll b, ll _mod) { return b ? modpow(a * a % _mod, b / 2, _mod) * (b % 2 ? a : 1) % _mod : 1; }
template<class T, class U> ostream& operator << (ostream& os, const pair<T, U>& p) { os << p.F << " " << p.S; return os; }
template<class T> ostream& operator << (ostream& os, const vector<T>& vec) { rep(i, sz(vec)) { if (i) os << " "; os << vec[i]; } return os; }
template<typename T> inline istream& operator >> (istream& is, vector<T>& v) { rep(j, sz(v)) is >> v[j]; return is; }
template<class T, class T2> inline void add(T &a, T2 b) { a += b % mod; if (a >= mod) a -= mod; }
template<class T> void operator += (vector<T>& v, vector<T> v2) { rep(i, sz(v2)) v.eb(v2[i]); }

void solve();

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  cout << fixed << setprecision(11);
  int T;
  T = 1;
  while (T--) solve();
}

void solve() {
  int n;
  cin >> n;
  vector<int> a(n);
  cin >> a;

  const int N = 1000005;
  vector<int> b(N);

  for (int x : a) {
    if (b[x] == 0) {
      for (int y = 2 * x; y < N; y += x) b[y]++;
    }
    b[x]++;
  }
  int ans = 0;
  for (int x : a) if (b[x] == 1) ans++;
  cout << ans << endl;
}

Buggy submission (verdict: Runtime Error):
import sys
input = sys.stdin.readline
import math
from collections import defaultdict

n = map(int, input())
a = list(map(int, input().split()))
N = 1000005
b = [0] * N

d = defaultdict(int)
for x in a:
    d[x] += 1

for x in d:
    for j in list(range(2, N)):
        if x * j >= N || b[x * j] == 1: #debuged
            break
        else:
            b[x * j] = 1

ans = 0
for x in a:
    if b[x] == 1:
        continue
    else:
        if d[x] >= 2:
            continue
        else:
            ans += 1
print(ans)