#include <bits/stdc++.h>
#include "gap.h"
#define F first
#define S second
using namespace std;
const int N = 2e5 + 10;
const long long inf = 1000000000000000000ll;
/*long long a[N];
int n;
void MinMax(long long s,long long t,long long &mn,long long &mx) {
for(int i = 1; i <= n; i++) {
if(a[i] >= s) {
mn = a[i];
break;
}
}
for(int i = 1; i <= n; i++) {
if(a[i] <= t) mx = a[i];
}
}*/
long long findGap(int t,int n) {
long long L,R,res = 1e18;
MinMax(0,inf,&L,&R);
for(int i = 1; i < (n + 1) / 2; i++) {
long long l = L,r = R;
MinMax(l + 1,r - 1,&L,&R);
if(L != -1) res = min(res,L - l);
if(R != -1) res = min(res,r - R);
}
return res;
}
/*signed main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n;
for(int i = 1; i <= n; i++) cin >> a[i];
cout << findGap(1,n);
return 0;
}
*/
