This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <iostream>
#include <cstring>
using namespace std;
void solve(int n, int m)
{
	cout << (m + (n-1)/2) << '\n';
	for(int i = 0; i < n; ++i)
		cout << (i <= n/2 ? string(m, '-') : string(m, '+')) << '\n';
}
int main()
{
	int t, n, m;
	cin >> t;
	while(t--)
	{
		cin >> n >> m;
		solve(n, m);
	}
	return 0;
}
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