#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[1001],n,min=99999,b=99999; cin>>n; for(int i=1;1<=n;i++){ cin>>a[i]; } for(int i=1;1<=n;i++){ if(a[i]<min){ a[i]=min; } } for(int i=1;1<=n-1;i++){ if(a[i]<b){ a[i]=b; } } if(b>min){ cout<<b-min; } else if(min>b){ cout<<min-b; } else{ cout<<0; } return 0; }