Submission #491957

#	Time	Username	Problem	Language	Result	Execution time	Memory
491957		franfill	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	51 ms	6076 KiB

molecules

#include<bits/stdc++.h>
#include "molecules.h"
using namespace std;
typedef long long ll;
typedef pair < ll , ll > ii;

std::vector<int> find_subset(int f, int u, std::vector<int> w)
{
	vector < ii > ws;
	for (int i = 0; i < w.size(); i++)
	{
		ws.push_back({w[i], i});
	}
	sort(ws.begin(), ws.end());

	ll l = 0;
	ll sum = ws[0].first;
	for (ll r = 1; r <= w.size(); r++)
	{
		while(sum > u)
		{
			sum -= ws[l++].first;
		}
		if (sum >= f)
		{
			vector < int > ans;
			for (int i = l; i < r; i++)
			{
				ans.push_back(ws[i].second);
			}
			return ans;
		}
		if (r < w.size()) sum += ws[r].first;
	}

	return {};
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:10:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |  for (int i = 0; i < w.size(); i++)
      |                  ~~^~~~~~~~~~
molecules.cpp:18:19: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  for (ll r = 1; r <= w.size(); r++)
      |                 ~~^~~~~~~~~~~
molecules.cpp:33:9: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   if (r < w.size()) sum += ws[r].first;
      |       ~~^~~~~~~~~~

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