Submission #1159983

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1159983	2025-03-01 14:20:27	nhphuc	Factories (JOI14_factories)	C++20	Compilation error	0 ms	0 KiB

factories

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#include <bits/stdc++.h>
#include "factories.h"
using namespace std;
const int N = 500500;
const long long inf = 1e16;
int sub[N], pos[N];
long long dis[N], mn[N];
pair<int, long long> par[N];
vector<int> modify;
vector<pair<int, int>> adj[N];
void dfs (int u, int p = 0, long long dep = 0){
    sub[u] = 1;
    dis[u] = dep;
    for (auto [v, d] : adj[u]){
        if (v != p && pos[v] == 0){
            dfs(v, u, dep + 1ll * d);
            sub[u] += sub[v];
        }
    }
}
int centroid (int u, int p, int n){
    for (auto [v, d] : adj[u]){
        if (v != p && pos[v] == 0 && sub[v] * 2 > n){
            return centroid(v, u, n);
        }
    }
 
 
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Compilation message (stderr)

factories.cpp: In function 'int32_t main()':
factories.cpp:103:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  103 |         freopen ("test.inp", "r", stdin);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
factories.cpp:104:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  104 |         freopen ("test.out", "w", stdout);
      |         ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccSoxILN.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccaZNqgp.o:factories.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status