Submission #1200093

#	Time	Username	Problem	Language	Result	Execution time	Memory
1200093		prince	September (APIO24_september)	C++20	Compilation error	0 ms	0 KiB

september

#include "bits/stdc++.h"

using namespace std;

vector<vector<int>>g;
vector<bool>vis;
set<int>st;

void dfs(int u){
    vis[u]=true;
    for(int v:g[u]){
        if(!vis[v])st.insert(v),dfs(v);
    }
}

int main(){
    int n,m;cin>>n>>m;
    g.assign(n,{});
    for(int i=0;i<n;i++){
        int x;cin>>x;
        if(x>=0)g[x].push_back(i);
    }
    int mn = 1e9;
    while(m--){
        st.clear();
        vis.assign(n,false);
        int cnt=0;
        for(int i=1;i<n;i++){
            int x;cin>>x;
            if(st.count(x))st.erase(x);
            else dfs(x);
            if(st.empty())cnt++;
        }
        mn=min(mn,cnt);
    }
    cout<<mn;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccPLKmmj.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccSrhnOe.o:september.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccPLKmmj.o: in function `mtbpdhr2zxjo1o4i9oreohsbuzzl4s6u::taskcase()':
grader.cpp:(.text+0x50d): undefined reference to `solve(int, int, std::vector<int, std::allocator<int> >, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)'
collect2: error: ld returned 1 exit status