Submission #62157

#	Time	Username	Problem	Language	Result	Execution time	Memory
62157		ernestvw	Detecting Molecules (IOI16_molecules)	C++11	100 / 100	95 ms	7948 KiB

molecules

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

vector<int> find_subset(int l, int u, vector<int> w) {
	vector<int> ans;
	vector<pair<int, int>> W;
	int n = (int)w.size();
	for(int i = 0; i < n; i++) W.push_back({w[i], i});
	sort(W.begin(), W.end());
	vector<long long> prefix(n+1);
	prefix[0] = 0;
	for(int i = 1; i <= n; i++) prefix[i] = prefix[i-1] + (long long)W[i-1].first;
	for(int i = 0; i < n; i++) {
		long long remove = prefix[i];
		if(prefix[n] - remove < l) continue;
		int cur = i;
		if(W[i].first < l) {
			for(int jump = 20; jump >= 0; jump--)
				if((1 << jump) + cur < n and prefix[(1 << jump) + cur + 1] - remove < l)
					cur += (1 << jump);
			cur++;
		}
		if(cur == n) continue;
		if(prefix[cur + 1] - remove > u) continue;
		for(int j = i; j <= cur; j++) ans.push_back(W[j].second);
		return ans;
	}
	return ans;
}

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