201609-1

#include <iostream>#include <math.h>using namespace std;int main(int argc, char *argv[]){    int first,second,max;    max=0;    int n; cin >> n;    cin >> first;    for(int i=2;i<=n;i++)    {        cin >> second;        max = max > abs(first-second)? max : abs(first-second);        first=second;    }    cout << max <<endl;    return 0;}