Submission #491981

#	Time	Username	Problem	Language	Result	Execution time	Memory
491981		nick_kcin	Detecting Molecules (IOI16_molecules)	C++14	31 / 100	1077 ms	836 KiB

molecules

#include <cstdio>
#include <vector>
#include <map>
#include <utility>
using namespace std;

// mappa numero-indice
map<int, int> found;

int nn[(int)1e6 + 5];
int nni;

vector<int> find_subset(int l, int u, vector<int> w)
{
	found[0] = -1;
	for (size_t i = 0; i < w.size(); i++)
	{
		int tw = w[i];
		fprintf(stderr, "tw = %d\n", tw);
		nni = 0;
		for (auto it = found.begin(); it != found.end(); it++)
		{
			int nxt = it->first + tw;
			if (nxt > u)
				continue;
			auto nit = found.find(nxt);
			if (nit != found.end())
				continue;
			nn[nni++] = nxt;
		}

		for (int k = 0; k < nni; k++)
		{
			found[nn[k]] = i;
		}
	}
	// for(auto it = found.begin(); it != found.end(); it++) {
	// 	fprintf(stderr, "D: %d -> %d\n", it->first, it->second);
	// }

	auto it = found.lower_bound(l);
	// fprintf(stderr, "DIT: %d -> %d\n", it->first, it->second);
	if (it != found.end() && it->first <= u)
	{
		vector<int> inx;
		int ww = it->first;
		int val = it->second;
		while(val != -1)
		{
			inx.push_back(val);
			int nxt = ww - w[val];
			// fprintf(stderr, "Dowo: val = %d, nxt=%d\n", val, nxt);
			val = found[nxt];
			ww = nxt;
			// sleep(1);
		}
		return inx;
	}
	else
	{
		return vector<int>(0);
	}
}

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31