#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
const int maxn = 100050;
int ara[maxn];
int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */ 
    int n,test,cas = 1;
    scanf("%d",&n);
    for(int i = 1;i<=n;i++){
        scanf("%d",ara + i);
    }
    sort(ara+1,ara+n+1);
    int mnn = 2000000000;
    for(int i = 2;i<=n;i++){
        mnn = min(mnn,abs(ara[i] - ara[i-1]));
    }
    printf("%d\n",mnn);
    return 0;
}