Submission #161521

#	Time	Username	Problem	Language	Result	Execution time	Memory
161521		kostia244	Detecting Molecules (IOI16_molecules)	C++14	0 / 100	2 ms	376 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>;
vi find_subset(int l, int u, std::vector<int> w) {
	bitset<10010> x, y;
	vi par(10010, -1);
	x.set(0);
	for(int i = 0; i < w.size(); i++) {
		y = x;
		y|=y<<w[i];
		x^=y;
		int p = x._Find_first();
		while(p<=10000) {
			par[p]=i;
			p = x._Find_next(p);
		}
		swap(x, y);
	}
	int sm = y._Find_next(l-1);
	if(sm>u)
		return {};
	vi ans;
	while(sm) {
		ans.pb(par[sm]);
		sm -= w[ans.back()];
	}
	return ans;
}

Compilation message (stderr)

molecules.cpp: In function 'vi find_subset(int, int, std::vector<int>)':
molecules.cpp:13:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < w.size(); i++) {
                 ~~^~~~~~~~~~

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