You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
25 lines
542 B
C++
25 lines
542 B
C++
#define _CRT_SECURE_NO_WARNINGS
|
|
#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
|
|
#include <bits/stdc++.h>
|
|
using namespace std;
|
|
typedef long long ll;
|
|
ll a[100010];
|
|
int main()
|
|
{
|
|
int T, n;
|
|
scanf("%d", &T);
|
|
while (T--)
|
|
{
|
|
scanf("%d", &n);
|
|
for (int i = 0; i < n; i++)
|
|
scanf("%lld", a + i);
|
|
sort(a, a + n);
|
|
ll sum = 0;
|
|
for (int i = 0; i < n; i++)
|
|
sum += a[n - 1] - a[i];
|
|
if (a[n - 1] - sum < 1) sum = -1;
|
|
printf("%lld\n", sum);
|
|
}
|
|
return 0;
|
|
}
|