Submission #1142608

#	Time	Username	Problem	Language	Result	Execution time	Memory
1142608		programming23	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

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

int dfs(int parent,vector<vector<int>> &Tree, int count){
    count++;
    int ln = Tree[parent].size();
    int pos = 0;
    for(int i=0; i < ln; i++){
        pos = max(pos, dfs(Tree[parent][i], Tree, count));
    }
    pos = max(count, pos);
    return pos;
}

int main(){
    
    int n;
    cin >> n;
    vector<vector<int>> Tree(n);
    vector<int> super;
    for(int i=0; i<n; i++){
        int p;
        cin >> p;
        if (p == -1) {
            super.push_back(i);
            continue;
        }
        p--;
        Tree[p].push_back(i);
    }
    int count = 0;
    int ln = super.size();
    for(int i=0; i < ln; i++){
        count = max(dfs(super[i], Tree, 0), count);
    }

    cout << count;
    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cclcw4AK.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccXHzY7h.o:combo.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cclcw4AK.o: in function `main':
grader.cpp:(.text.startup+0x4c): undefined reference to `guess_sequence[abi:cxx11](int)'
collect2: error: ld returned 1 exit status