#include <bits/stdc++.h>
#include "doll.h"
using namespace std;
using ll = long long;
using pii = pair<int, int>;
void create_circuit(int M, std::vector<int> A) {
int N = A.size();
vector<int> C(M+1, 0);
C[0] = A[0];
map<int, int> mp;
for (int i=0; i<N; i++) {
mp[A[i]]++;
}
vector<int> X, Y;
C[0] = A[0];
map<int, int> id;
for (int i=0; i<N-1; i++) {
if (id.count(A[i])) {
Y[id[A[i]]] = A[i+1];
}
else if (mp[A[i]] >= 2) {
X.push_back(A[i+1]);
Y.push_back(-1e9);
C[A[i]] = -(X.size());
id[A[i]] = X.size()-1;
}
else {
C[A[i]] = A[i+1];
}
}
if (id.count(A[N-1])) {
Y[id[A[N-1]]] = 0;
}
else {
C[A[N-1]] = 0;
}
answer(C, X, Y);
}
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