Submission #73717

#	Time	Username	Problem	Language	Result	Execution time	Memory
73717		Hoget157	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	70 ms	5548 KiB

molecules

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

typedef pair<int,int> P;

vector<int> find_subset(int l, int u, std::vector<int> w) {
	vector<P> vec;
	int n = w.size();
	for(int i = 0;i < n;i++) vec.push_back(P(w[i],i));
	sort(vec.begin(),vec.end());
	vector<int> ans;
	ll s = 0;
	for(int i = 0;i < n;i++){
		s += vec[n - i - 1].first;
		ans.push_back(vec[n - i - 1].second);
		if(l <= s && s <= u) return ans;
		if(s > u) break;
	}
	if(s < l) return vector<int>(0);
	reverse(ans.begin(),ans.end());
	for(int i = 0;i < ans.size();i++){
		s = s - w[ans[i]] + vec[i].first;
		ans[i] = vec[i].second;
		if(l <= s && s <= u) return ans;
	}
	return vector<int>(0);
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:23:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0;i < ans.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