Submission #491952

#	Time	Username	Problem	Language	Result	Execution time	Memory
491952		lorenzoferrari	Detecting Molecules (IOI16_molecules)	C++14	Compilation error	0 ms	0 KiB

molecules

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int find_subset(int l, int u, int w[], int n, int r[]) {
  multiset<ll> m;
  for (int i = 0; i < n; ++i)
    m.insert(w[i]);
  if (*m.begin() > u)
    return 0;
  ll sum = 0;
  multiset<ll> ans;
  while (!m.empty() && sum < l) {
    auto it = m.end(); --it;
    sum += *it;
    ans.insert(*it);
    m.erase(it);
  }
  if (sum < l) return 0;
  while (sum > u) {
    auto a = m.begin();
    auto b = ans.end(); --b;
    ll aa = *a;
    ll bb = *b;
    m.erase(a);
    ans.erase(b);
    sum += aa - bb;
    m.insert(bb);
    ans.insert(aa);
  }
  int cnt = 0;
  for (int i = 0; i < n; ++i) {
    auto it = ans.find(w[i]);
    if (it != ans.end()) {
      ans.erase(it);
      r[cnt++] = i;
    }
  }
  return cnt;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccRTahqf.o: in function `main':
grader.cpp:(.text.startup+0x18d): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status