#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>

int main() {
    int size;
    std::cin >> size;
    
    std::vector<int> numbers(size);
    for (int i = 0; i < size; ++i) {
        std::cin >> numbers[i];
    }
    
    std::sort(std::begin(numbers), std::end(numbers));
    
    int result = std::abs(numbers[size - 1] - numbers[0]);
    for (int i = 0; i < size - 1; ++i) {
        result = std::min(
            result,
            std::abs(numbers[i] - numbers[i + 1])
        );
    }
    
    std::cout << result;
    return 0;
}