Submission #1015002

#	Time	Username	Problem	Language	Result	Execution time	Memory
1015002		ziyad_alharbi	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include <bits/stdc++.h>
using namespace std;
int n;
int L, R;
pair<long long, long long>wh[200005];
bool b;
set<int>st;
void f(int x,long long s)
{
	//cout << x << ' ';
	if (s >= L&&!b)
	{
		b = 1;
		return;
	}
	if (x == n || b || wh[x].first + s > R)return;
	//cout << x << ' ' << s << '\n';
	g.insert({ x,s });
	f(x + 1, s + wh[x].first);
	if (b)return;
	st.erase(wh[x].second);
	f(x + 1, s);
}
vector<int> find_subset(int l, int u, vector<int> w)
{
	n = w.size();
	long long s = 0;
	for (int x = 0; x < n; x++)
	{
		wh[x].first = w[x];
		wh[x].second = x;
		s += w[x];
	}
	sort(wh, wh + n);
	L = l;
	R = u;
	if (s >= L && s <= R)
	{
		vector<int>a;
		for (int x = 0; x < n; x++)
		{
			a.push_back(x);
		}
		return a;
	}
	else if (s < L)
	{
		return vector<int>(0);
	}
	f(0, 0);
	if (st.size())
	{
		vector<int>a;
		for (auto i : st)
		{
			a.push_back(i);
		}
		return a;
	}
	else
	{
		return vector<int>(0);
	}
	
}
/*signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	//cin>>t;
	while (t--)
	{
		int N, L, R;
		cin >> N >> L >> R;
		vector<int> w(N);
		for (int x = 0; x < N; x++)
		{
			cin >> w[x];
		}
		vector<int>a = find_subset(L, R, w);
		int nh = a.size();
		for (int x = 0; x < nh; x++)cout << a[x] << ' ';
	}
	return 0;
}*/

Compilation message (stderr)

molecules.cpp: In function 'void f(int, long long int)':
molecules.cpp:18:2: error: 'g' was not declared in this scope
   18 |  g.insert({ x,s });
      |  ^