#include"bits/stdc++.h"
// #include"grader.cpp"
// #define int long long
#define endl '\n'
using namespace std;
// void build(vector<int> u, vector<int> v, vector<int> a, vector<int> b);
int construct_roads(std::vector<int> x, std::vector<int> y) {
int n = x.size();
vector<pair<int,int>> v;
for (int i = 0 ; i < n ; i++) v.emplace_back(y[i], i);
sort(v.begin(), v.end());
for (int i = 1 ; i < n ; i++) {
if (v[i].first != v[i-1].first + 2) return 0;
}
vector<int> u, vv, a, b;
for (int i = 1 ; i < n ; i++) {
u.push_back(v[i-1].second);
vv.push_back(v[i].second);
a.push_back(x[0] + 1);
b.push_back(v[i-1].first + 1);
}
build(u, vv, a, b);
return 1;
}
Compilation message
parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:22:2: error: 'build' was not declared in this scope
22 | build(u, vv, a, b);
| ^~~~~
