#include "paint.h"
#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 13;
vector<int> v[N];
int dp[N],n,lst[N],val[N];
int minimumInstructions(int nn, int m, int k,vector<int> C,vector<int> A,vector<vector<int>> B) {
n = nn;
for(int i = 0;i < m;i++){
for(int j:B[i]){
v[j].push_back(i);
}
}
set<int> st;
const int inf = 1e9;
st.insert(n);
for(int i = n - 1;i >= 0;i--){
bool ok = false;
for(int j:v[C[i]]){
int nx = j + 1;
if(j + 1==m) nx = 0;
if(lst[nx] == i + 1){
val[j] = val[nx] + 1;
}else{
val[j] = 1;
}
if(val[j] >= m){
ok = true;
}
lst[j] = i;
// cout << j << ' ' << val[j] << "x\n";
}
// cout << i << ' ' << ok << '\n';
// continue;
if(ok){
st.insert(i);
}else{
dp[i] =inf;
continue;
}
auto it = st.upper_bound(i + m);
if(it == st.begin()){
dp[i] = inf;continue;
}
it--;
dp[i] = dp[*it] + 1;
// cout << i << ' ' << dp[i] << '\n';
}
return (dp[0] != inf? dp[0]:-1);
}
