1360B.cpp

//🎃🎃🎃😎😎😁🤓☣☣☣☣☣dark_coder☣☣☣☣☣😎😎😁🤓🎃🎃🎃
#include <bits/stdc++.h>
using namespace std;
#define IOS                  \
    ios::sync_with_stdio(0); \
    cin.tie(0);              \
    cout.tie(0);
#define all(x) (x).begin(), (x).end()
#define li long long int
#define pi pair<int, int>
int main()
{
    IOS int t;
    cin >> t;
    while (t--)
    {
        vector<int> v;
        int n;
        cin >> n;
        for (int i = 0; i < n; i++)
        {
            int temp;
            cin >> temp;
            v.push_back(temp);
        }
        int mind = INT_MAX;
        for (int i = 0; i < v.size() - 1; i++)
        {
            if (v[i + 1] - v[i] < mind)
                mind = v[i + 1] - v[i];
        }
        cout<<mind<<endl;
    }

    return 0;
}