Submission #1012428

#	Time	Username	Problem	Language	Result	Execution time	Memory
1012428		amirhoseinfar1385	Dreaming (IOI13_dreaming)	C++17	Compilation error	0 ms	0 KiB

dreaming

#include "dreaming.h"
#include<bits/stdc++.h>
using namespace std;
const long long maxn=100000+10;
struct yal{
    long long u,v,w;
    long long getad(long long fu){
        return (u^v^fu);
    }
}alle[maxn];
long long n,m,l,mainres=0,vis[maxn];
vector<long long>adj[maxn];
pair<long long,long long>mx[maxn];


pair<int,int>comp(pair<int,int>a,int b){
    if(b>a.first){
        a.first=b;
        if(a.first>a.second){
            swap(a.first,a.second);
        }
    }
    return a;
}

void dfsdown(long long u,long long par=-1){
    mx[u]=make_pair(0,0);
    for(auto x:adj[u]){
        long long v=alle[x].getad(u);
        if(v==par){
            continue;
        }
        dfsdown(v,u);
        mx[u]=comp(mx[u],mx[v].second+alle[x].w);
    }
    return ;
}

void dfsup(long long u,long long par=-1,long long l=-1){
    mx[u]=comp(mx[u],l);
    mainres=max(mainres,mx[u].first+mx[u].second);
    for(auto x:adj[u]){
        long long v=alle[x].getad(u);
        if(v==par){
            continue;
        }
        long long z=mx[u].second;
        if(mx[u].second==mx[v].second+alle[x].w){
            z=mx[u].first;
        }
        dfsup(v,u,z);
    }
}

long long get(long long u,long long par=-1){
    long long ret=u;
    for(auto x:adj[u]){
        long long v=alle[x].getad(u);
        if(v==par){
            continue;
        }
        long long r=get(v,u);
        if(mx[ret].second>mx[r].second){
            ret=r;
        }
    }
    return ret;
}

long long calc(long long u){
    dfsdown(u);
    dfsup(u);
    return get(u);
}

long long travelTime(long long N, long long M, long long L, long long A[], long long B[], long long T[]) {
    n=N;
    m=M;
    l=L;
    for(long long i=0;i<m;i++){
        alle[i].u=A[i];
        alle[i].v=B[i];
        alle[i].w=T[i];
        adj[alle[i].u].push_back(i);
        adj[alle[i].v].push_back(i);
    }
    vector<long long>alls;
    for(long long i=1;i<=n;i++){
        if(vis[i]==0){
            alls.push_back(calc(i));
        }
    }
    sort(alls.rbegin(),alls.rend());
    if((long long)alls.size()==2){
        mainres=max(mainres,alls[0]+alls[1]+l);
    }
    if((long long)alls.size()>=3){
        mainres=max(mainres,alls[0]+alls[1]+l);
        mainres=max(mainres,alls[1]+alls[2]+2*l);
    }
    return mainres;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc3g1MRk.o: in function `main':
grader.c:(.text.startup+0xd1): undefined reference to `travelTime'
collect2: error: ld returned 1 exit status