Submission #569328

#	Time	Username	Problem	Language	Result	Execution time	Memory
569328		Edil	Road Closures (APIO21_roads)	C++17	Compilation error	0 ms	0 KiB

roads

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vct vector <int>
struct ed
{
    ll x = 0;
    set <ll> y;
};
bool cmp(ed a, ed b)
{
    if(a.x == b.x)
        return a.y > b.y;
    return a.x > b.x;
}
vector <ll> minimum_closure_costs(ll n, vct u, vct v, vct w)
{
    ll sm = 0;
    vector <ll> ans(n+1);
    vector <ed> tr(n+1);
    for(ll i = 0; i < w.size(); i++)
    {
        tr[u[i]].x++;
        tr[v[i]].x++;
        tr[u[i]].y.insert(w[i]);
        tr[v[i]].y.insert(w[i]);
        sm += w[i];
    }
    ans[0] = sm;
    sort(tr.begin(), tr.end(), cmp);
    for(ll k = n; k > 0; k--)
    {
        sm = 0;
        for(ll i = 0; tr[i].x > k; i++)
        {
            tr[i].x--;
            sm += *tr[i].y.begin();
            tr[i].y.erase(tr[i].y.begin());
        }
        ans[k] = sm;
    }
    return ans;
}

Compilation message (stderr)

roads.cpp: In function 'std::vector<long long int> minimum_closure_costs(long long int, std::vector<int>, std::vector<int>, std::vector<int>)':
roads.cpp:21:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(ll i = 0; i < w.size(); i++)
      |                   ~~^~~~~~~~~~
/usr/bin/ld: /tmp/cc2XdjCg.o: in function `main':
grader.cpp:(.text.startup+0x277): undefined reference to `minimum_closure_costs(int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status