제출 #231537

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
231537		nickmet2004	꿈 (IOI13_dreaming)	C++11	0 / 100	72 ms	16888 KiB

dreaming

#include<bits/stdc++.h>
#include"dreaming.h"
#define f first
#define s second

using namespace std;

const int N = 2e5 + 500;
typedef pair<int, int> ipair;
int n , m , L;
vector<ipair> adj[N];
int dpD[N] , dpU[N] , dpD1[N] , dpD2[N];
bool vis[N];
vector<int> dist;
int ans;
int MN = 2e9 + 5;

void dfsU(int u , int p){
    for(ipair x : adj[u]){
        int v = x.f , w = x.s;
        if(v == p) continue;
        dpU[v] = dpU[u] + w;
        if(dpD[v] + w == dpD1[u]){
            if(dpD2[u] != -1) dpU[v] = max(dpU[v] , dpD2[u] + w);
        } else dpU[v] = max(dpU[v] , dpD1[u] + w);
        dfsU(v , u);
    }
    if(MN > max(dpD[u] , dpU[u])){
        MN = max(dpD[u] , dpU[u]);
        ans = max(ans , dpD[u] + dpU[u]);
    }
}
void dfsD(int u , int BOSS){
    vis[u] = 1;
    for(ipair x : adj[u]){
        int v = x.f , w = x.s;
        if(vis[v]) continue;
        dfsD(v , BOSS);
        dpD[u] = max(dpD[u] , dpD[v] + w);
        if(dpD2[u] < dpD[v] + w){dpD2[u] = dpD[v] + w; if(dpD2[u] > dpD1[u])swap(dpD2[u] , dpD1[u]);};
    }
    if(u == BOSS) dfsU(u ,-1);
}

int travelTime(int N , int M , int L , int A[] , int B[] , int C[]){
    n = N; m = M; L = L;
    for(int i = 0; i < m; ++i){
        adj[A[i]].emplace_back(B[i] , C[i]);
        adj[B[i]].emplace_back(A[i] , C[i]);
    }
    dist.assign(n , 0);
    memset(dpD1 , -1 , sizeof(dpD1));
    memset(dpD2 , -1 , sizeof(dpD2));
    for(int i = 0; i < n; ++i){
        if(!vis[i]){
            dfsD(i , i);
            dist.emplace_back(MN);
            //cerr << MN << " mn " << endl;
            MN = 2e9;
        }
    }
    /*
    for(int i = 0; i < n; ++i){
        cerr << i << " i " << dpD[i] << " dpD " << dpU[i] << " dpU " << endl;
    }
    */
    sort(dist.begin() , dist.end()); reverse(dist.begin() ,dist.end());
    //for(int i = 0; i < dist.size(); ++i) cerr << dist[i] << " "; cerr << endl;
    //cerr << ans << "ans" << endl;
    return max({dist[0] + dist[1] + L , dist[1] + dist[2] + L + L , ans});
}
/*
int main (){
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n >> m >> L;
    for(int i = 0; i < m; ++i){
        int u , v , w;
        cin >> u >> v >> w;
        adj[u].emplace_back(v, w);
        adj[v].emplace_back(u, w);
    }
    dist.assign(n , 0);
    memset(dpD1 , -1 , sizeof(dpD1));
    memset(dpD2 , -1 , sizeof(dpD2));
    for(int i = 0; i < n; ++i){
        if(!vis[i]){
            dfsD(i , i);
            dist.emplace_back(MN);
            //cerr << MN << " mn " << endl;
            MN = 2e9;
        }
    }
    /*
    for(int i = 0; i < n; ++i){
        cerr << i << " i " << dpD[i] << " dpD " << dpU[i] << " dpU " << endl;
    }
    
    sort(dist.begin() , dist.end()); reverse(dist.begin() ,dist.end());
    //for(int i = 0; i < dist.size(); ++i) cerr << dist[i] << " "; cerr << endl;
    //cerr << ans << "ans" << endl;
    cout <<  max({dist[0] + dist[1] + L , dist[1] + dist[2] + L + L , ans});
    return 0;
}
*/

컴파일 시 표준 에러 (stderr) 메시지

dreaming.cpp:93:5: warning: "/*" within comment [-Wcomment]
     /*

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