Submission

Score: 0

User: gay69

Problemset: ละลานตา

Language: cpp

Time: 0.006 second

Submitted On: 2025-08-24 11:49:28

#include <bits/stdc++.h>

using namespace std;

const int maxc = 1e5 + 5;

int freq[maxc];

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n, k;
    cin >> n >> k;
    int arr[n];
    for (int i = 0; i < n; i++) {
        cin >> arr[i];
        arr[i]--;
    }
    int sum = 0, cur = 0;
    int l = 0, r = 0;
    while (r < n && cur < k) {
        cur += (freq[arr[r]] == 0);
        freq[arr[r]]++;
        r++;
    }
    sum += (cur >= k);
    while (r < n) {
        while (cur >= k) {
            freq[arr[l]]--;
            cur -= (freq[arr[l]] == 0);
            l++;
        }
        sum += l + 1;
        cur += (freq[arr[r]] == 0);
        freq[arr[r]]++;
        r++;
    }
    cout << sum << "\n";
    return 0;
}