/*
Find the minimum difference possible between any two elements in the given array.

Input format
There are 2 lines of input.

First line will contain a single integer n representing the size of the array.

Second line will contain n space separated integers representing the array.

Output format
Output the answer in single line.

Sample Input 1
3

1 2 4

Sample Output 1
1

Explanation 1
2 - 1 = 1 minimum difference

Constraints
2<=n<=100000

1<=A[i]<=1000000000
*/

/**
 * @param {number} n
 * @param {number[]} arr
 * @return {number}
 */
function minDiff(n, arr) {
  let minDiff=1e9;
  arr.sort((a,b)=>a-b);
  for(let i=1;i<n;i++){
      minDiff=Math.min(minDiff,arr[i]-arr[i-1]);
  }
  return minDiff;
//   console.log(arr)
//   return arr[1]-arr[0];
}

function main() {
    let n = parseInt(readLine());
    let arr = readIntArr();

    let minimumDifference = minDiff(n, arr);
    print(minimumDifference)
}