Submission #441276

#	Time	Username	Problem	Language	Result	Execution time	Memory
441276		julian33	Dreaming (IOI13_dreaming)	C++14	0 / 100	53 ms	16452 KiB

dreaming

#include <bits/stdc++.h>
#include "dreaming.h"

using namespace std;

#ifdef LOCAL
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {
    cerr<<vars<<" = ";
    string delim="";
    (...,(cerr<<delim<<values,delim=", "));
    cerr<<"\n";
}
#else
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {}
#endif

#define pb push_back
#define sz(x) (int)(x.size())
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
template<typename T> inline void maxa(T& a,T b){a=max(a,b);}
template<typename T> inline void mina(T& a,T b){a=min(a,b);}

const int mxN=1e5+5;

vector<pii> graph[mxN];
ll dist[mxN];
int ep,seen[mxN];
vector<int> path;

void dfs(int at,int p){
    path.pb(dist[at]);
    seen[at]=1;
    if(dist[at]>dist[ep])
        ep=at;
    for(pii &i:graph[at]){
        if(i.first!=p){
            dist[i.first]=dist[at]+i.second;
            dfs(i.first,at);
        }
    }
}

void merge(pii &a,pii &b,int L){
    if(max(a.first,b.first)>a.second+b.second+L){
        a.first=max(a.first,b.first);
    } else{
        a.first=a.second+b.second+L;
        a.second=max(a.second,b.second)+L;
    }
}

int travelTime(int N,int M,int L,int A[],int B[],int T[]){
    for(int i=0;i<M;i++){
        graph[A[i]].pb({B[i],T[i]});
        graph[B[i]].pb({A[i],T[i]});
    }
    vector<pii> all;
    for(int i=0;i<N;i++){
        if(seen[i])
            continue;
        ep=N;
        dfs(i,-1);
        path.clear();
        dist[ep]=0;
        dfs(ep,-1);
        all.pb({dist[ep],*lower_bound(path.begin(),path.end(),dist[ep]/2)});
        deb(i,all.back().first,all.back().second);
        path.clear();
    }
    pii ans=all[0];
    deb(ans.first,ans.second);
    for(int i=1;i<sz(all);i++){
        merge(ans,all[i],L);
        deb(ans.first,ans.second);
    }
    return ans.first;
}

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