Submission #1021228

#	Time	Username	Problem	Language	Result	Execution time	Memory
1021228		vjudge1	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	39 ms	5972 KiB

molecules

// #pragma once

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

int n;
ll a[200100];

ll sum(int l, int r){
	return a[r] - a[l-1];
}

std::vector<int> find_subset(int L, int R, std::vector<int> w){
	n = w.size();
	for(int i = 0; i < n; i++){
		a[i+1] = w[i];
	}
	sort(a + 1, a + n + 1);
	for(int i = 1; i <= n; i++){
		a[i] += a[i-1];
	}
	for(int k = 1; k <= n; k++){
		if(max(1ll * L, sum(1, k)) <= min(1ll * R, sum(n - k + 1, n))){
			int i = 1;
			while(sum(i, i + k - 1) < L || sum(i, i + k - 1) > R){
				i++;
			}
			multiset<int> s;
			for(int j = i; j < i + k; j++){
				s.insert(a[j] - a[j-1]);
			}
			vector<int> res;
			for(int i = 0; i < n; i++){
				if(s.count(w[i])){
					s.erase(s.find(w[i]));
					res.push_back(i);
				}
			}
			return res;
		}
	}
	return {};
}

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