CF链接

#include<bits/stdc++.h>
using namespace std;
int main() {
	int t;
	cin >> t;
	while (t--) {
		int n;
		cin >> n;
		set<int>s;
		for (int i = 0; i < n; i++) {
			int num;
			cin >> num;
			s.insert(num);
		}
		if (s.size() == 1)cout << n << endl;
		else cout << n - 1 << endl;
	}
	return 0;
}