Summat

#include <algorithm>
#include <iostream>

using namespace std;

int n;
int bs[100];
int seq[100];
void find(int depth) {
	if (depth == n) {
		int asd[100];
		int c = 0;
		for (int i = 0; i < n; ++i) {
			for (int a = i + 1; a < n; ++a) {
				asd[c++] = seq[i] + seq[a];
			}
		}
		sort(asd, asd + c);
		if (equal(asd, asd+c, bs)) {
			for (int i = 0; i < n - 1; ++i) {
				cout << seq[i] << " ";
			}
			cout << seq[n-1] << endl;
			exit(0);
		}
		return;
	}			
	for (int i = 1; i <= 5; ++i) {
		seq[depth] = i;
		find(depth + 1);
	}
}

int main()
{
	cin >> n;
	if (n < 3 || n > 5) {
		return -1;
	}
	for (int i = 0; i < n*(n-1)/2; ++i) {
		cin >> bs[i];
	}
	sort(bs, bs + n*(n-1)/2);
	find(0);
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

Test 6

Group: 2, 3

Verdict: RUNTIME ERROR

Test 7

Group: 2, 3

Verdict: RUNTIME ERROR

Test 8

Group: 2, 3

Verdict: RUNTIME ERROR

Test 9

Group: 2, 3

Verdict: RUNTIME ERROR

Test 10

Group: 2, 3

Verdict: RUNTIME ERROR

Test 11

Group: 3

Verdict: RUNTIME ERROR

Test 12

Group: 3

Verdict: RUNTIME ERROR

Test 13

Group: 3

Verdict: RUNTIME ERROR

Test 14

Group: 3

Verdict: RUNTIME ERROR

Test 15

Group: 3

Verdict: RUNTIME ERROR