C - Not so Diverse

C - Not so Diverse

#include <bits/stdc++.h>
 
#define rep(i,n) for(int i=0; i<(n); ++i)
#define repx(i,x,n) for(int i=x; i<(n); ++i)
#define fixed_setprecision(n) fixed << setprecision((n))
#define execution_time(ti) printf("Execution Time: %.4lf sec\n", 1.0 * (clock() - ti) / CLOCKS_PER_SEC);
#define pai 3.1415926535897932384
#define NUM_MAX 2e18
#define NUM_MIN -1e9
 
using namespace std;
using ll = long long;
using P = pair<int,int>;
template<class T> inline bool chmax(T& a, T b){ if(a<b){ a=b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b){ if(a>b){ a=b; return 1; } return 0; }

int main() {
    int N, K;
    cin >> N >> K;
    map<int, int> mp;
    for(int i=0; i<N; i++){
        int a;
        cin >> a;
        mp[a]++;
    }

    vector<int> A;
    for(auto &m:mp) A.push_back(m.second);
    sort(A.begin(), A.end());

    int ans=0;
    int sum = mp.size();
    for(int i=0; i<sum - K; i++){
        ans += A[i];
    }
    cout << ans << endl;

    return 0;
}