#include <cstdio>
#include <algorithm>
using namespace std;

int tn, ti, n, a[100000 + 5], i;

int main (int argc, char * const argv[]) {
	scanf("%d", &tn);
	for(ti = 0; ti < tn; ti++) {
		
		// Input reading
		
		scanf("%d", &n);
		for(i = 1; i <= n; i++) scanf("%d", &a[i]);
		
		// The answer is the first + the second number in the array obtained by the sorting
		
		sort(a + 1, a + n + 1);
		printf("%d\n", a[1] + a[2]);
	}
    return 0;
}