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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void solve(int t) {
  5.     int n;
  6.     cin >> n;
  7.  
  8.     int x; 
  9.     map<int, int> cnt;
  10.     int mx = 0;
  11.  
  12.     for (int i = 0; i<n; i++){
  13.         cin >> x;
  14.         cnt[x-i]++;
  15.         mx = max(mx,cnt[x]);
  16.     }
  17.     cout << n - mx << '\n';
  18. }
  19.  
  20. int main() {
  21.     int t;
  22.     cin >> t;
  23.     while (t--) solve(t);
  24. }
Success #stdin #stdout 0.01s 5292KB
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https://ideone.com/l9NPns
language:
C++ (gcc 8.3)
created:
4 hours ago
visibility:
public

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