#include <stdio.h>
int main(void){
	int val = 0;
	scanf("%d",&val);
	
	int num[val];
	int max = -1000000;
	int min = 1000000;
	for(int i = 0;i < val;i ++){
		scanf("%d",&num[i]);
		if(num[i] > max){
			max = num[i];
		}
		if(num[i] < min){
			min = num[i];
		}
	}
	int interval = num[1] - num[0];
	for(int i = 2;i < val;i ++){
		if(interval > num[i] - num[i - 1]){
			interval = num[i] - num[i - 1];
		}
	}
	
	printf("%d%d",interval,max - min);
}