Submission #1197303

#	Time	Username	Problem	Language	Result	Execution time	Memory
1197303		batman3747	September (APIO24_september)	C++20	Compilation error	0 ms	0 KiB

september

#include "bits/stdc++.h"
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << (#x) << " " << (x) << endl
#define SZ(s) ((int)s.size())
#define pb push_back
#define ff first
#define ss second
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

int solve(int n, int m, vi F, vector<vi> S){
    vi l(n, n), r(n);
    vector<vi> g(n);
    for(int i = 1; i < n; i ++) g[F[i]].pb(i);
    for(int j = 0; j < m; j ++){
        for(int i = 0; i < n - 1; i ++){
            int d = S[j][i];
            l[d] = min(l[d], i + 1);
            r[d] = max(r[d], i + 1);
        }
    }

    auto dfs = [&](auto &&dfs, int v, int p = -1) -> void {
        if(p != -1) l[v] = min(l[v], l[p]);
        for(int u : g[v]){
            dfs(dfs, u, v);
            r[v] = max(r[v], r[u]);
        }
    };

    dfs(dfs, 0);
    vector<pii> ln;
    for(int i = 1; i < n; i ++) ln.pb({l[i], r[i]});
    sort(all(ln));
    int ans = 0, cur = 0;
    for(auto [x, y] : ln){
        if(x > y) ans ++;
        cur = max(cur, y);
    }
    return ans;
}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    //freopen("square.in", "r", stdin);
    //freopen("square.out", "w", stdout);

    


    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccv7ov3c.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccFDN5Vp.o:september.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status