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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. inline int power(int a, int b) {
  7.     int x = 1;
  8.     while (b) {
  9.         if (b & 1) x *= a;
  10.         a *= a;
  11.         b >>= 1;
  12.     }
  13.     return x;
  14. }
  15.  
  16.  
  17. const int M = 1000000007;
  18. const int N = 3e5+9;
  19. const int INF = 2e9+1;
  20. const int LINF = 2000000000000000001;
  21.  
  22. //_ ***************************** START Below *******************************
  23.  
  24. vector<int> a;
  25.  
  26. int consistency(int n, int k){
  27.  
  28. 	int ans = 0;
  29.  
  30. 	unordered_map<int,int> mp;
  31. 	int s = 0, e = 0;
  32. 	while(e<n){
  33. 		mp[a[e]]++;
  34.  
  35. 		if(mp.size() <= k){
  36. 			ans += e-s+1;
  37. 			e++;
  38. 		}
  39. 		else{
  40. 			while(s<=e && mp.size() > k){
  41. 				mp[a[s]]--;
  42. 				if(mp[a[s]] == 0) mp.erase(a[s]);
  43. 				s++;
  44. 			}
  45. 			ans += (e-s+1);
  46. 			e++;
  47. 		}
  48. 	}
  49.  
  50. 	return ans;
  51. }
  52.  
  53.  
  54.  
  55.  
  56.  
  57.  
  58.  
  59.  
  60. int practice(int n, int k){
  61.  
  62.  
  63. 	return 0;
  64.  
  65. }
  66.  
  67.  
  68.  
  69.  
  70. void solve() {
  71.  
  72.     int n, k;
  73.     cin>>n >> k;
  74.  
  75.     a.resize(n);
  76.     for(int i=0; i<n; i++) cin >> a[i];
  77.  
  78.     cout << consistency(n, k) << endl;
  79.  
  80.  
  81. }
  82.  
  83.  
  84.  
  85.  
  86.  
  87. int32_t main() {
  88.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  89.  
  90.     int t = 1;
  91.     // cin >> t;
  92.     while (t--) {
  93.         solve();
  94.     }
  95.  
  96.     return 0;
  97. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/IDJHiM
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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