#include <bits/stdc++.h>
#include "paint.h"
// #include "grader.cpp"
using namespace std;
int minimumInstructions(int n, int m, int K, vector<int> C, vector<int> A, vector<vector<int>> B) {
vector<vector<int>> F(K);
for (int i = 0; i < m; i++) {
for (auto j : B[i])
F[j].push_back(i);
}
vector<vector<int>> P(n + 1, vector<int>(m, -1));
for (int i = n - 1; i >= 0; i--) {
for (auto j : F[C[i]])
P[i][j] = max(i, P[i + 1][(j + 1) % m]);
}
int r = 0, R = 0, cnt = 0;
for (int i = 0; i < n; i++) {
bool tr = false;
for (auto j : F[C[i]])
tr |= (i + m - 1 <= P[i][j]);
if (tr) r = i;
if (R == i) {
if (r + m <= R) return -1;
cnt++;
R = r + m;
}
}
return cnt;
}
