#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho
#include "dreaming.h"
using ll=int;
using ld=long double;
int const INF=1000000005;
ll const LINF=1000000000000000005;
ll const mod=1000000007;
ld const PI=3.14159265359;
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define endl '\n'
#define CODE_START ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
vector<pair<ll,ll>>g[100005];
vector<ll>comp;
map<ll,ll>viz;
ll bg;
map<ll,ll> bfs(ll node){
map<ll,ll>dist;
dist[node]=0;
queue<ll>q;
q.push(node);
ll mx=0;
while(!q.empty()){
ll x=q.front();
q.pop();
comp.pb(x);
for(auto it : g[x]){
if(dist[it.f]==0&&it.f!=node){
dist[it.f]=dist[x]+it.s;
q.push(it.f);
if(dist[it.f]>mx){
mx=dist[it.f];
bg=it.f;
}
}
}
}
return dist;
}
int travel_time(int n,int m,int l,vector<int>a,vector<int>b,vector<int>t){
cin>>n>>m;
for(ll i=1;i<=m;i++)
{
g[a[i-1]].pb(mp(b[i-1],t[i-1]));
g[b[i-1]].pb(mp(a[i-1],t[i-1]));
}
vector<pair<ll,ll>>v;
for(ll i=0;i<n;i++)
{
if(viz[i]){
continue;
}
bg=i;
map<ll,ll>x=bfs(bg);
comp.clear();
map<ll,ll>y=bfs(bg);
ll ans=bg;
ll mx=max(x[ans],y[ans]);
for(auto it : comp){
if(max(x[it],y[it])<mx){
mx=max(x[it],y[it]);
ans=it;
}
}
v.pb(mp(mx,ans));
}
sort(v.begin(),v.end());
for(ll i=1;i<v.size();i++)
{
g[v[i].s].pb(mp(v[0].s,l));
g[v[0].s].pb(mp(v[i].s,l));
}
bg=0;
bfs(0);
map<ll,ll>x=bfs(bg);
map<ll,ll>y=bfs(bg);
int ans=0;
for(ll i=0;i<n;i++)
{
ans=max(ans,max(x[i],b[i]));
}
return ans;
}
Compilation message
dreaming.cpp:6:15: warning: overflow in conversion from 'long int' to 'll' {aka 'int'} changes value from '1000000000000000005' to '-1486618619' [-Woverflow]
6 | ll const LINF=1000000000000000005;
| ^~~~~~~~~~~~~~~~~~~
dreaming.cpp: In function 'int travel_time(int, int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
dreaming.cpp:73:13: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
73 | for(ll i=1;i<v.size();i++)
| ~^~~~~~~~~
/usr/bin/ld: /tmp/ccOD4jMS.o: in function `main':
grader.c:(.text.startup+0xd1): undefined reference to `travelTime'
collect2: error: ld returned 1 exit status
