Submission #196901

#	Time	Username	Problem	Language	Result	Execution time	Memory
196901		Juney	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	77 ms	6276 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

vector<int> find_subset(int l, int u, vector<int> w) {
	vector<int> ans;
	vector<pii> v;
	for(int i=0; i<w.size(); i++) v.push_back(pii(w[i], i));
	sort(v.begin(), v.end(), greater<pii>());
	ll sum = 0;
	for(int i=0; i<v.size(); i++) {
		sum += v[i].first;
		ans.push_back(v[i].second);
		if(sum >= l) {
			if(sum <= u) return ans;
			int k = 0;
			for(int j=v.size()-1; j>i && k<ans.size(); j--) {
				sum -= w[ans[k]];
				sum += w[v[j].second];
				ans[k] = v[j].second;
				k++;
				if(sum <= u) return ans;
			}
			return vector<int> ();
		}
	}
	return vector<int> ();
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:11:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<w.size(); i++) v.push_back(pii(w[i], i));
               ~^~~~~~~~~
molecules.cpp:14:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<v.size(); i++) {
               ~^~~~~~~~~
molecules.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int j=v.size()-1; j>i && k<ans.size(); j--) {
                                 ~^~~~~~~~~~~

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