제출 #541779

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
541779		Sho10	꿈 (IOI13_dreaming)	C++17	0 / 100	755 ms	22376 KiB

dreaming

#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;
ll mxN=1e5+5;
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);
vector<bool>check(mxN,false);
check[node]=1;
ll mx=0;
viz[node]=1;
while(!q.empty()){
    ll x=q.front();
    q.pop();
    comp.pb(x);
    viz[x]=1;
    for(auto it : g[x]){
        if(check[it.f]==0){
            dist[it.f]=dist[x]+it.s;
            q.push(it.f);
            check[it.f]=1;
            if(dist[it.f]>mx){
                mx=dist[it.f];
                bg=it.f;
            }
        }
    }
}
return dist;
}
int travelTime(int n,int m,int l,int a[], int b[], 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;
}

컴파일 시 표준 에러 (stderr) 메시지

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:79:13: 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]
   79 | for(ll i=1;i<v.size();i++)
      |            ~^~~~~~~~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 10
• Subtask 3: 0 / 23
• Subtask 4: 0 / 18
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23