#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a[10001],min_x=10000,n; cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; } for(int i=1;i<=n;i++){ for(int j=i;j<=n;j++){ if(a[i]>a[j]){ min_x=min((abs(a[i])-abs(a[j])),min_x); }else{ min_x=min((abs(a[j])-abs(a[i])),min_x); } } } cout<<min_x; return 0; }