func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t, n, a[100];     cin >> t;     while (t--) {       cin >> n;       for (int i = 0; i < n; i++) {         cin >> a[i];       }       sort(a, a + n);       vector<int> v;       int dif = 0;       for (int i = 1; i < n; i++) {         dif = a[i] - a[i - 1];         v.push_back(dif);       }       sort(v.begin(), v.end());       cout << v[0] << endl;     }     return 0;   }   