Submission #1151085

#	Time	Username	Problem	Language	Result	Execution time	Memory
1151085		adkjt	Bitaro’s Party (JOI18_bitaro)	C++20	Compilation error	0 ms	0 KiB

bitaro

#include<bits/stdc++.h>
using namespace std;

vector<int> g[111111],a[111111];
int mx[111111],dis[111111];
vector<pair<int,int>> now[111111];
int close[111111];
int main()
{
    int n,m,q;cin>>n>>m>>q;
    for(int i=1;i<=m;i++)
    {
        int u,v;cin>>u>>v;
        g[v].push_back(u);
        a[u].push_back(v);
    }
    memset(mx,-1,sizeof mx);
    for(int i=1;i<=n;i++)
    {
        now[i].push_back({0,i});
        vector<int> use;
        for(auto x:g[i])
        {
            for(auto xx: now[x])
            {
                if(mx[xx.second]==-1)
                {
                    mx[xx.second]=xx.first+1;
                    use.push_back(xx.second);
                }
                else mx[xx.second]=max(mx[xx.second],xx.first+1);
            }
        }
        for(auto x:use)
        {
            now[i].push_back({mx[x],x});
            mx[x]=-1;
        }
        sort(now[i].begin(),now[i].end());
        reverse(now[i].begin(),now[i].end());
        while(now[i].size()>sqrt(n)) now[i].pop_back();

    }
    while(q--)
    {
        int T,Y;cin>>T>>Y;
        for(int i=1;i<=n;i++) close[i]=0;
        for(int i=1;i<=Y;i++)
        {
            int x;cin>>x;
            close[x]=1;
        }
        int sq=sqrt(n);
        if(Y>sq)
        {
            int ans=-1;
            for(int i=1;i<=n;i++) dis[i]=INT_MIN;
            dis[T]=0;
            for(int i=T;i>0;i--)
            {
                for(auto x:a[i])
                {
                    dis[i]=max(dis[i],dis[x]+1);
                }
                if(close[i]) continue;
                ans=max(ans,dis[i]);
            }

            cout<<ans<<'\n';
        }
        else
        {
            int ch=0;
            for(auto x:now[T])
            {
                if(!close[x.second])
                {
                    cout<<x.first<<'\n';
                    ch=1;
                    break;
                }
            }
            if(!ch) cout<<-1<<'\n';

        }

    }
}

Compilation message (stderr)

bitaro.cpp:7:17: error: 'int close [111111]' redeclared as different kind of entity
    7 | int close[111111];
      |                 ^
In file included from /usr/include/x86_64-linux-gnu/bits/sigstksz.h:24,
                 from /usr/include/signal.h:328,
                 from /usr/include/c++/11/csignal:42,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:43,
                 from bitaro.cpp:1:
/usr/include/unistd.h:358:12: note: previous declaration 'int close(int)'
  358 | extern int close (int __fd);
      |            ^~~~~
bitaro.cpp: In function 'int main()':
bitaro.cpp:47:38: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   47 |         for(int i=1;i<=n;i++) close[i]=0;
      |                                      ^
bitaro.cpp:47:39: error: assignment of read-only location '*(close + ((sizetype)i))'
   47 |         for(int i=1;i<=n;i++) close[i]=0;
      |                               ~~~~~~~~^~
bitaro.cpp:51:20: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   51 |             close[x]=1;
      |                    ^
bitaro.cpp:51:21: error: assignment of read-only location '*(close + ((sizetype)x))'
   51 |             close[x]=1;
      |             ~~~~~~~~^~
bitaro.cpp:65:27: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   65 |                 if(close[i]) continue;
      |                           ^
bitaro.cpp:76:35: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   76 |                 if(!close[x.second])
      |                                   ^