Submission #533867

#	Time	Username	Problem	Language	Result	Execution time	Memory
533867		M_W	Detecting Molecules (IOI16_molecules)	C++11	100 / 100	46 ms	6176 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
#define ii pair<int, int>
using namespace std;

std::vector<int> find_subset(int l, int u, std::vector<int> w) {
	vector<ii> a;
	for(int i = 0; i < w.size(); i++) a.push_back({w[i], i});
	sort(a.begin(), a.end());
	
	int k = 0;
	long long pref = 0, suf = 0;
	for(; k < w.size(); k++){
		pref += a[k].first * 1ll; suf += a[w.size() - k - 1].first * 1ll;
		if(pref <= u && suf >= l) break;
	}
	
	for(int i = k; i < w.size(); i++){
		if(pref >= l && pref <= u){
			vector<int> ans;
			for(int j = i - k; j <= i; j++) ans.push_back(a[j].second);
			return ans;
		}
		pref += (a[i + 1].first - a[i - k].first) * 1ll;
	}
	
    return std::vector<int>(0);
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:8:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |  for(int i = 0; i < w.size(); i++) a.push_back({w[i], i});
      |                 ~~^~~~~~~~~~
molecules.cpp:13:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for(; k < w.size(); k++){
      |        ~~^~~~~~~~~~
molecules.cpp:18:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  for(int i = k; i < w.size(); i++){
      |                 ~~^~~~~~~~~~

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