#include "highway.h"
#include <bits/stdc++.h>
using namespace std;
#define flash ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define debug(x) cerr << " - " << #x << ": " << x << endl;
#define debugs(x, y) cerr << " - " << #x << ": " << x << " " << #y << ": " << y << endl;
#define all(x) (x).begin(),(x).end()
#define sz(x) (ll)x.size()
#define ll long long
#define INF 1000000000
#define pb push_back
struct greateri
{
template<class T>
bool operator()(T const &a, T const &b) const { return a > b; }
};
int dist[90001];
vector<int>adj[90001];
bool vis[90001];
map<pair<int,int>,int>gg;
map<pair<int,int>,int>gg1;
map<int,vector<int>>gg2;
int s,t;
int s1;
int n,m;
void dfs_tree(int node)
{
dist[node]=s1;
gg2[s1].pb(node);
s1+=s;
vis[node]=1;
for (int i = 0; i < adj[node].size(); ++i)
{
if(vis[adj[node][i]]!=1)
{ gg[{adj[node][i],node}]=gg1[{min(adj[node][i],node),max(adj[node][i],node)}];
dfs_tree(adj[node][i]);}
}
s1-=s;
}
void find_pair(int N,vector<int>U, vector<int>V, int A, int B)
{
//flash;
n=N;
m=U.size();
for (int i = 0; i < m; ++i)
{
int x,y;
x=U[i];
y=V[i];
adj[x].pb(y);
adj[y].pb(x);
gg1[{min(x,y),max(x,y)}]=i;
}
s=A;
t=B;
s1=0;
dfs_tree(0);
vector<int> now(m,0);
ll vol = ask(now);
int l = 0;
vector<int> hioi = gg2[vol];
int r = hioi.size()-1;
int last=0;
while (l < r) {
fill(now.begin(), now.end(), 0);
int m = (l+r)/2;
for (int i = l; i <= m; ++i)
{
auto voli = gg.lower_bound({hioi[i],-INF});
auto kal = *voli;
int kal1 = kal.second;
now[kal1]=1;
last=hioi[i];
}
int dol = ask(now);
if(l==r)
{
answer(0,last);
return;
}
if(dol!=vol)r=m;
else l=m+1;
}
ask(0,last);
}
//code the AC sol !
// BS/queue/map
Compilation message
highway.cpp: In function 'void dfs_tree(int)':
highway.cpp:32:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < adj[node].size(); ++i)
~~^~~~~~~~~~~~~~~~~~
highway.cpp: In function 'void find_pair(int, std::vector<int>, std::vector<int>, int, int)':
highway.cpp:84:15: error: invalid initialization of reference of type 'const std::vector<int>&' from expression of type 'int'
ask(0,last);
^
In file included from highway.cpp:1:0:
highway.h:7:11: note: in passing argument 1 of 'long long int ask(const std::vector<int>&)'
long long ask(const std::vector<int> &w);
^~~
