a = int(input())
while a*2 != 0:
a = a - 1
b = int(input())
c = list(map(int,input().split()))
for i in range(len(c)):
print(max(c)-min(c))
break
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
int t, n;
signed main(){
if(ifstream("ok.inp")){
freopen("ok.inp", "r", stdin);
freopen("ok.out", "w", stdout);
}
cin >> t;
while (t--){
cin >> n;
int maxx = INT_MIN;
int minn = INT_MAX;
while (n--){
int num;
cin >> num;
maxx = max(maxx, num);
minn = min(minn, num);
}
cout << maxx - minn << endl;
}
}1629D - Peculiar Movie Preferences | 1629E - Grid Xor |
1629F1 - Game on Sum (Easy Version) | 2148. Count Elements With Strictly Smaller and Greater Elements |
2149. Rearrange Array Elements by Sign | 2150. Find All Lonely Numbers in the Array |
2151. Maximum Good People Based on Statements | 2144. Minimum Cost of Buying Candies With Discount |
Non empty subsets | 1630A - And Matching |
1630B - Range and Partition | 1630C - Paint the Middle |
1630D - Flipping Range | 1328A - Divisibility Problem |
339A - Helpful Maths | 4A - Watermelon |
476A - Dreamoon and Stairs | 1409A - Yet Another Two Integers Problem |
977A - Wrong Subtraction | 263A - Beautiful Matrix |
180C - Letter | 151A - Soft Drinking |
1352A - Sum of Round Numbers | 281A - Word Capitalization |
1646A - Square Counting | 266A - Stones on the Table |
61A - Ultra-Fast Mathematician | 148A - Insomnia cure |
1650A - Deletions of Two Adjacent Letters | 1512A - Spy Detected |