func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long MOD = 1000000007;   const long long INF = 1e15;   using Graph = vector<vector<long long>>;   signed main() {     long long T;     cin >> T;     for (long long t = 0; t < T; t++) {       long long N;       cin >> N;       vector<long long> A(N);       for (long long i = 0; i < N; i++) cin >> A[i];       sort(A.begin(), A.end());       long long ans = 1000000;       for (long long i = 1; i < N; i++) {         ans = min(ans, A[i] - A[i - 1]);       }       cout << ans << endl;     }   }   