Taulukko

input/code.cpp: In function 'int main()':
input/code.cpp:5:5: error: 'ios_base' has not been declared
     ios_base::sync_with_stdio(0);
     ^~~~~~~~
input/code.cpp:6:5: error: 'cin' was not declared in this scope
     cin.tie(0);
     ^~~
input/code.cpp:6:5: note: suggested alternative:
In file included from input/code.cpp:1:0:
/usr/include/c++/7/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^~~
input/code.cpp:20:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 if (m.size() > k) {
                     ~~~~~~~~~^~~

#include <iostream>
#include <map>

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    int k;
    std::cin >> n >> k;
    int x[n];
    for(int i=0;i<n;i++){
        std::cin >> x[i];
    }
    std::map<int, int> m;
    long r = 0;
    int j = 0;
    for(int i=0;i<n;i++) {
        if (j <= n) {
            for(;;) {
                if (m.size() > k) {
                    r += j-i-1;
                    break;
                } else if (j < n) {
                    m[x[j]]++;
                    j++;
                } else {
                    r += j-i;
                    j++;
                    break;
                }
            }
        } else {
            r += n-i;
        }
        m[x[i]]--;
        if (m[x[i]] == 0) {
            m.erase(x[i]);
        }
    }
    std::cout << r << '\n';
    return 0;
}