// Validator
#include "testlib.h"
#include <algorithm>
#include <cassert>
#include <iostream>
#include <vector>
using namespace std;

#include <atcoder/fenwicktree>

int main(int argc, char **argv) {

    registerValidation(argc, argv);
    int M = inf.readInt(2, 10000000);
    inf.readSpace();
    int K = inf.readInt(1, 400000 / M);
    inf.readEoln();

    const int N = M * K;
    vector<int> A(N);
    for (int i = 0; i < N; ++i) {
        A[i] = inf.readInt(0, M - 1);
        if (i + 1 < N) {
            inf.readSpace();
        } else {
            inf.readEoln();
        }
    }
    inf.readEof();

    vector<int> ord(N);
    vector<int> freq(M);
    vector<vector<int>> v2i(M);
    for (int i = 0; i < N; ++i) {
        cin >> A[i];
        ord[i] = A[i] + freq[A[i]] * M;
        v2i[A[i]].push_back(i);
        freq[A[i]]++;
    }
    assert(freq == vector<int>(M, K));

    long long current = 0;
    atcoder::fenwick_tree<int> bit(N);
    for (int i = 0; i < N; ++i) {
        current += bit.sum(ord[i], N);
        bit.add(ord[i], 1);
    }
    long long ret = current;
    vector<vector<int>> prvs(K);
    for (int i = 0; i < N; ++i) prvs.at(ord[i] / M).push_back(i);
    for (auto &v : prvs) sort(v.begin(), v.end());

    for (auto &is : v2i) {
        for (int t = 0; t < K; ++t) {
            int i = is.at(t);
            int nlo = lower_bound(prvs[t].begin(), prvs[t].end(), i) - prvs[t].begin();
            int nhi = M - 1 - nlo;
            current += nhi - nlo;
        }
        ret = min(ret, current);
    }
    cout << ret << '\n';
}