Submission #789791

#	Time	Username	Problem	Language	Result	Execution time	Memory
789791		pravcoder	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	42 ms	6188 KiB

molecules

#include "molecules.h"
#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

typedef vector<int> vi;
typedef pair<int, int> pi;
typedef vector<pi> vpi;
typedef long long ll;

vi find_subset(int l, int u, vi w) {
    vpi m;
	for (int i = 0; i < w.size(); i++)
	{
		m.push_back({ w[i], i });
	}
	sort(m.begin(), m.end());
	int start = m.size() - 1;
	ll sum = m[start].first;
	vi set = { start };
	while ((sum < l) && (start > 0)) {
		start--;
		sum += m[start].first;
		set.push_back(start);
	}
	if (sum < l) return vi(0);
	int r = m.size() - 1;
	int t = 0;
	while ((sum > u) && (t < start) && (r >= start)) {
		set[t] = t;
		sum -= m[r].first - m[t].first;
		r--;
		t++;
	}
	if (sum > u) return vi(0);
	vi ans;
	for (auto mol : set) {
		ans.push_back(m[mol].second);
	}
	return ans;
}

Compilation message (stderr)

molecules.cpp: In function 'vi find_subset(int, int, vi)':
molecules.cpp:16:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |  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