Submission #233181

#	Time	Username	Problem	Language	Result	Execution time	Memory
233181		luciocf	Toys (CEOI18_toy)	C++14	79 / 100	5080 ms	3804 KiB

toy

#include <bits/stdc++.h>

using namespace std;

int n;
vector<int> d;

set<int> ans;

bool comp(int a, int b) {return a > b;}

void f(int ind, int prod, int soma)
{
	if (ind >= d.size()) return;

	if (prod == n)
	{
		ans.insert(soma);
		return;
	}

	if (1ll*prod*d[ind] <= 1ll*n)
		f(ind, prod*d[ind], soma+d[ind]-1);

	f(ind+1, prod, soma);
}

int main(void)
{
	scanf("%d", &n);

	for (int i = 2; i*i <= n; i++)
	{
		if (n%i) continue;

		d.push_back(i);
		if (n/i != i) d.push_back(n/i);
	}

	d.push_back(n);
	sort(d.begin(), d.end(), comp);

	f(0, 1, 0);

	printf("%d\n", ans.size());
	for (auto x: ans)
		printf("%d ", x);
	printf("\n");
}

Compilation message (stderr)

toy.cpp: In function 'void f(int, int, int)':
toy.cpp:14:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (ind >= d.size()) return;
      ~~~~^~~~~~~~~~~
toy.cpp: In function 'int main()':
toy.cpp:45:27: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::set<int>::size_type {aka long unsigned int}' [-Wformat=]
  printf("%d\n", ans.size());
                 ~~~~~~~~~~^
toy.cpp:30:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 0 / 21