using namespace std;
#include<vector>
//void answer(std::vector<int> C, std::vector<int> X, std::vector<int> Y);
int find_s(int M, vector<int> A){
int N = A.size();
A.push_back(0);
std::vector<int> C(M + 1,19);
std::vector<int> X(2*N+1), Y(2*N+1);
int l = 0, r = N;
int wr = 0;
while(l<r){
int rt = l-1;
int lt = rt - (r-l)/2;
int it = r;
for(int i = lt; i<=rt; i++){
if(r == N){
Y[wr]=it;
it--;
if(it >=l){
X[wr]=it;
}else{
X[wr] = 2;
}
it--;wr++;
}
else{
Y[wr]=it;
it--;
if(it >=l){
X[wr]=it;
}else{
X[wr] = 2;
}
it--,wr++;
}
}
l=lt,r=rt;
}
return l;
}
#include <algorithm>
#define vi vector<int>
vi getper(int N){
if(N==1)return {0};
vi per1= getper(N/2), per2 = getper((N+1)/2);
vi ans;
for(int i = 0; i < N; i++){
if(i%2){
ans.push_back(per1[i/2]+(N+1)/2);
}else{
ans.push_back(per2[i/2]);
}
}
return ans;
}
void create_circuit(int M, std::vector<int> A) {
int s = find_s(M,A);
int N = A.size();
vector<int> per;
A.push_back(0);
std::vector<int> C(M + 1,s);
std::vector<int> X(-s), Y(-s);
int l = 0, r = N;
int wr = 0;
while(l<r){
int rt = l-1;
int lt = rt - (r-l)/2;
int it = r;
for(int i = lt; i<=rt; i++){
if(r == N){
Y[wr]=it;
it--;
if(it != r-1 || (r-l)%2){
X[wr]=it;
it--;
}else{
X[wr] = s;
}
wr++;
}
else{
Y[wr]=it;
it--;
if(it != r-1 || (r-l)%2){
X[wr]=it;
it--;
}else{
X[wr] = s;
}
wr++;
}
}
l=lt,r=rt;
}
int st = s;
while(st!=N){
if(st < 0){
int stag = X[-1-st];
swap(X[-1-st],Y[-1-st]);
st = stag;
}else{
per.push_back(st);
st = s;
}
}
per.push_back(N);
vi q(N+1);
for(int i = 0; i <= N; i++)q[per[i]]=i;
for(int i = 0; i< (-s); i++){
if(X[i]>=0)X[i] = A[q[X[i]]];
if(Y[i]>=0)Y[i] = A[q[Y[i]]];
}
per.push_back(0);
answer(C,X,Y);
}
Compilation message
highway.cpp: In function 'void create_circuit(int, std::vector<int>)':
highway.cpp:117:3: error: 'answer' was not declared in this scope
117 | answer(C,X,Y);
| ^~~~~~
