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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define int long long
  5.  
  6. void solve() {
  7.     int n;
  8.     cin >> n;
  9.  
  10.     vector<int> a(n);
  11.  
  12.     int g = 0;
  13.  
  14.     for(int i = 0; i < n; i++) {
  15.         cin >> a[i];
  16.         g = __gcd(g, a[i]);
  17.     }
  18.  
  19.     int cnt = 0;
  20.  
  21.     for(int x : a) {
  22.         if(x == g) cnt++;
  23.     }
  24.  
  25.     if(cnt > 0) {
  26.         cout << n - cnt << '\n';
  27.         return;
  28.     }
  29.  
  30.     int best = 1e9;
  31.  
  32.     for(int i = 0; i < n; i++) {
  33.         int cur = 0;
  34.  
  35.         for(int j = i; j < n; j++) {
  36.             cur = __gcd(cur, a[j]);
  37.  
  38.             if(cur == g) {
  39.                 best = min(best, j - i + 1);
  40.                 break;
  41.             }
  42.         }
  43.     }
  44.  
  45.     cout << n + best - 2 << '\n';
  46. }
  47.  
  48. signed main() {
  49.     ios::sync_with_stdio(false);
  50.     cin.tie(nullptr);
  51.  
  52.     int t;
  53.     cin >> t;
  54.  
  55.     while(t--) solve();
  56. }
Success #stdin #stdout 0s 5316KB
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https://ideone.com/9pRJRS
language:
C++ (gcc 8.3)
created:
19 hours ago
visibility:
public

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