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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6.  
  7.  
  8. const int M = 1000000007;
  9. const int N = 3e5+9;
  10. const int INF = 2e9+1;
  11. const int LINF = 2000000000000000001;
  12.  
  13. inline int power(int a, int b) {
  14.     int x = 1;
  15.     a %= M;
  16.     while (b) {
  17.         if (b & 1) x = (x * a) % M; 
  18.         a = (a * a) % M;
  19.         b >>= 1;
  20.     }
  21.     return x;
  22. }
  23.  
  24.  
  25. //_ ***************************** START Below *******************************
  26.  
  27.  
  28.  
  29.  
  30. vector<int> a;
  31.  
  32. int consistency(int n){
  33.  
  34.     vector<int> freq(n+1);
  35.     for(int i=0; i<n; i++){
  36.         freq[a[i]]++;
  37.     }
  38.  
  39.     sort(begin(freq), end(freq), greater<int>());
  40.  
  41.     int ans = 0;
  42.     int i=0;
  43.     int val = freq[0];
  44.     while(i<n){
  45.         val = min(val, freq[i]);
  46.         if(val == 0) break;
  47.  
  48.         ans += val;
  49.         val--;
  50.         i++;
  51.     }
  52.  
  53.     return ans;
  54. }
  55.  
  56.  
  57.  
  58.  
  59.  
  60.  
  61.  
  62.  
  63.  
  64.  
  65.  
  66.  
  67.  
  68.  
  69.  
  70. int practice(int n){
  71.  
  72.  
  73.     return 0;
  74. }
  75.  
  76.  
  77.  
  78.  
  79.  
  80. void solve() {
  81.  
  82.     int n;
  83.     cin>> n;
  84.  
  85.     a.resize(n);
  86.     for(int i=0; i<n; i++) cin >> a[i];
  87.  
  88.     cout << consistency(n) << endl;
  89.  
  90.  
  91. }
  92.  
  93.  
  94.  
  95.  
  96.  
  97. int32_t main() {
  98.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  99.  
  100.     int t = 1;
  101.     cin >> t;
  102.     while (t--) {
  103.         solve();
  104.     }
  105.  
  106.     return 0;
  107. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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3
8
1 4 8 4 5 6 3 8
16
2 1 3 3 4 3 4 4 1 3 2 2 2 4 1 1
9
2 2 4 4 4 7 7 7 7
stdout
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3
10
9
https://ideone.com/WW0y36
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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