Submission #161591

#	Time	Username	Problem	Language	Result	Execution time	Memory
161591		kostia244	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	191 ms	18152 KiB

molecules

#include "molecules.h"
#include<bits/stdc++.h>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define pb push_back
using namespace std;
using ll = long long;
using vi = vector<int>;
vector<pair<int, int>> v;
vi find_subset(int l, int u, std::vector<int> w) {
	for(int i = 0; i < w.size(); i++) v.pb({w[i], i});
	sort(all(v));
	set<pair<ll, ll>> x;
	x.insert({0, -1});
	ll sm = 0;
	for(int i = 0; i < w.size(); i++) {
		sm += v[i].first;
		auto it = x.lower_bound({sm-u, -99999});
		if(it!=x.end()) {
//			cout << j << " " << (it->second) << "\n";
			ll val = sm - it->first;
			if(val >= l && val <= u) {
				vi ans;
				for(int j = it->second+1; j <= i; j++)
					ans.pb(v[j].second);
				return ans;
			}
		}
		x.insert({sm, i});
	}
	return {};
}

Compilation message (stderr)

molecules.cpp: In function 'vi find_subset(int, int, std::vector<int>)':
molecules.cpp:11:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < w.size(); i++) v.pb({w[i], i});
                 ~~^~~~~~~~~~
molecules.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; 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