Submission #62042427

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#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
void solve() {
  int n;
  cin >> n;
  vector <int> a (n);
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
  }
  auto reduce = [&] (int x, int y) -> array <int, 2> {
    while (__gcd(x, y) != 1) {
      int g = __gcd(x, y);
      x /= g;
      y /= g;
    }
    return {x, y};
 
 
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#include <bits/stdc++.h>
using namespace std;

using i64 = long long;

void solve() {
  int n;
  cin >> n;

  vector <int> a (n);
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
  }

  auto reduce = [&] (int x, int y) -> array <int, 2> {
    while (__gcd(x, y) != 1) {
      int g = __gcd(x, y);
      x /= g;
      y /= g;
    }
    return {x, y};
  };

  array <int, 2> r = reduce(a[0], a[1]);
  for (int i = 0; i < n - 1; ++i) {
    if (reduce(a[i], a[i + 1]) != r) {
      cout << "No" << '\n';
      return;
    }
  }

  cout << "Yes" << '\n';
}

int main() {
  ios_base::sync_with_stdio(0);cin.tie(0);
  int tests = 1;
  // cin >> tests;
  for (int test = 0; test < tests; ++test) {
    solve();
  }
}

Submission Info

Judge Result