Submission #1241405

#	Time	Username	Problem	Language	Result	Execution time	Memory
1241405		vivkostov	Werewolf (IOI18_werewolf)	C++20	Compilation error	0 ms	0 KiB

werewolf

#pragma once
#include "werewolf.h"
#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
int n,m,q,a[200005],b[200005],l[200005],r[200005],used1[3005],used2[3005],lamp;
vector<int>v[200005],otg;
void dfs1(int beg,int l)
{
    used1[beg]=1;
    int w;
    for(int i=0;i<v[beg].size();i++)
    {
        w=v[beg][i];
        if(w>=l&&!used1[w])dfs1(w,l);
    }
}
void dfs2(int beg,int l,int r)
{
    used2[beg]=1;
    if(used1[beg])
    {
        if(beg>=l&&beg<=r)lamp=1;
    }
    int w;
    for(int i=0;i<v[beg].size();i++)
    {
        w=v[beg][i];
        if(w<=r&&!used2[w])dfs2(w,l,r);
    }
}
vector<int> check_validity(int N,vector<int> X,vector<int> Y,vector<int> S,vector<int> E,vector<int> L, vector<int> R)
{
    n=N;
    m=X.size();
    q=S.size();
    for(int i=1;i<=m;i++)
    {
        v[X[i-1]+1].push_back(Y[i-1]+1);
        v[Y[i-1]+1].push_back(X[i-1]+1);
    }
    for(int i=1;i<=q;i++)
    {
        a[i]=S[i-1]+1;
        b[i]=E[i-1]+1;
        l[i]=L[i-1]+1;
        r[i]=R[i-1]+1;
        memset(used1,0,sizeof(used1));
        memset(used2,0,sizeof(used2));
        lamp=0;
        dfs1(a[i],l[i]);
        dfs2(b[i],l[i],r[i]);
        otg.push_back(lamp);
    }
    return otg;
}

Compilation message (stderr)

werewolf.cpp:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
/usr/bin/ld: /tmp/cckzmefI.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cca1UF3Y.o:werewolf.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status