#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define fo(i, n) for(ll i = 0; i<(n); i++)
#define pb push_back
#define F first
#define S second
#define deb(x) cout << #x << " = " << (x) << endl
#define deb2(x, y) cout << #x << " = " << (x) << ", " << #y << " = " << (y) << endl
typedef vector<ll> vl;
typedef vector<vl> vvl;
ll ask(vector<int> w);
void anwer(ll a, ll b);
void find_pair(int N, std::vector<int> U, std::vector<int> V, int A, int B) {
int M = U.size();
vl invalid(N, 0);
for (int j = 0; j < 50; ++j) {
std::vector<int> w(M);
for (int i = 0; i < M; ++i) {
w[i] = rand()%2;
}
long long toll = ask(w);
priority_queue<pair<ll, ll>> pq;
pq.push({0, 0});
vl seen(N, 0);
ll cost, pos;
vector<vector<pair<ll, ll>>> adj(N);
fo(i, M){
adj[U[i]].pb({V[i], w[i]});
adj[V[i]].pb({U[i], w[i]});
}
while(!pq.empty()){
tie(cost, pos) = pq.top();
pq.pop();
cost = -cost;
if(seen[pos]) continue;
invalid[pos]|=cost!=toll;
seen[pos] = 1;
for(auto &[v, w] : adj[pos]){
pq.push({-cost-w, v});
}
}
}
int ans = 0;
fo(i, N) if(!invalid[i]) ans = i;
answer(0, ans);
}
Compilation message
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:51:5: error: 'answer' was not declared in this scope; did you mean 'anwer'?
51 | answer(0, ans);
| ^~~~~~
| anwer
