Submission #491971

#	Time	Username	Problem	Language	Result	Execution time	Memory
491971		StoRovinato	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	66 ms	4444 KiB

molecules

#include <bits/stdc++.h>


#include "molecules.h"

using namespace std;

typedef long long ll;

vector<int> find_subset(int l, int u, vector<int> w)
{
	vector<int> ordine(w.size());
	iota(ordine.begin(), ordine.end(), 0);
	sort(ordine.begin(), ordine.end(), [&](int a, int b){return w[a] < w[b];});

	sort(w.begin(), w.end());
	vector<ll> pref(w.size() + 1);

	pref[0] = 0;
	for (int i = 1; i <= w.size(); i++)
		pref[i] = pref[i - 1] + w[i - 1];

	vector<int> ris;

	for (int i = 1; i <= w.size(); i++)
	{
		int finale = lower_bound(pref.begin(), pref.end(), l + pref[i - 1]) - pref.begin();

		//cout << i << " - " << finale << "\n";

		if (finale <= w.size() && finale >= i && pref[finale]  - pref[i - 1] <= u)
		{
			for (int j = i - 1; j < finale; j++)
				ris.push_back(ordine[j]);
			break;
		}
	}

	return ris;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for (int i = 1; i <= w.size(); i++)
      |                  ~~^~~~~~~~~~~
molecules.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for (int i = 1; i <= w.size(); i++)
      |                  ~~^~~~~~~~~~~
molecules.cpp:31:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |   if (finale <= w.size() && finale >= i && pref[finale]  - pref[i - 1] <= u)
      |       ~~~~~~~^~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 23 / 23
• Subtask 6: 31 / 31