Kolikot

input/code.cpp: In function 'void calc(int, int)':
input/code.cpp:13:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if (kolikot.size() == i) return;
                        ^

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

using namespace std;

vector<int> mahdolliset;
vector<int> kolikot;

void calc(int i, int luku)
{
	if (kolikot.size() == i) return;

	mahdolliset.push_back(luku + kolikot[i]);

	calc(i + 1, luku + kolikot[i]);
	calc(i + 1, luku);
}

int main()
{
		int count;
		cin >> count;
		
		while (count > 0)
		{
			int num;
			cin >> num;
			kolikot.push_back(num);
			mahdolliset.push_back(num);
			count--;
		}

		// jos 1 ei löydy kolikoista, on se automaattisesti pienin vastaus
		if (!(find(kolikot.begin(), kolikot.end(), 1) != kolikot.end()))
		{
			cout << 1 << endl;
			return 0;
		}

		calc(0, 0);

		/*for (auto i = mahdolliset.begin(); i != mahdolliset.end(); ++i)
			std::cout << *i << ' ';
		cout << endl;*/

		sort(mahdolliset.begin(), mahdolliset.end());

		int pienin = mahdolliset[mahdolliset.size() - 1] + 1;
		for (size_t i = mahdolliset[mahdolliset.size() - 1] + 1; i > 0; i--)
		{
			if (!(find(mahdolliset.begin(), mahdolliset.end(), i) != mahdolliset.end()))
				pienin = i;
		}

		cout << pienin << endl;
		return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: RUNTIME ERROR

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: RUNTIME ERROR

Test 10

Group: 2

Verdict: RUNTIME ERROR

Test 11

Group: 3

Verdict: RUNTIME ERROR

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: RUNTIME ERROR

Test 15

Group: 3

Verdict: RUNTIME ERROR

Test 16

Group: 3

Verdict: RUNTIME ERROR