Submission #1358783

#	Time	Username	Problem	Language	Result	Execution time	Memory
1358783		Charizard2021	Dreaming (IOI13_dreaming)	C++20	Compilation error	0 ms	0 KiB

dreaming

#include "dreaming.h"
#include<bits/stdc++.h>
using namespace std;
vector<vector<pair<int, int> > > adj;
vector<bool> visited;
vector<long long> res;
long long dfs(int u, int p){
    long long ans = 0;
    for(pair<int, int> x : adj[u]){
        int v = x.first;
        if(v != p){
            ans = max(ans, dfs(v, u) + x.second);
        }
    }
    return ans;
}
long long dfs2(int u, int p){
    visited[u] = true;
    long long ans = res[u];
    for(pair<int, int> x : adj[u]){
        int v = x.first;
        if(v != p){
            ans = max(ans, dfs2(v, u));
        }
    }
    return ans;
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]){
    adj.resize(N);
    visited.resize(N);
    res.resize(N);
    for(int i = 0; i < M; i++){
        adj[A[i]].push_back(make_pair(B[i], T[i]));
        adj[B[i]].push_back(make_pair(A[i], T[i]));
    }
    for(int i = 0; i < N; i++){
        res[i] = dfs(i, 0);
    }
    vector<long long> thing;
    for(int i = 0; i < n; i++){
        if(!visited[i]){
            thing.push_back(dfs2(i, 0));
        }
    }
    sort(thing.begin(), thing.end());
    reverse(thing.begin(), thing.end());
    if((int)thing.size() > 1){
        return thing[0] + thing[1] + L;
    }
    else{
        return 0;
    }
}

Compilation message (stderr)

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:40:24: error: 'n' was not declared in this scope
   40 |     for(int i = 0; i < n; i++){
      |                        ^