#include<bits/stdc++.h>
#include "gap.h"
using namespace std;
typedef long long ll;
#define fi first
#define se second
#define ii pair<int,int>
#define vii vector<pair<int,int> >
#define vi vector<int>
ll arr[100010] ;
ll findGap(int t , int n){
int sz = n ;
if(t == 1){
MinMax( 0 , 1e18 , arr + 1 , arr + n ) ;
sz-=2 ;
int i = 1 ;
while(sz > 0){
MinMax( arr[i]+1 , arr[n-i+1]-1 , arr + i + 1 , arr + n - i ) ;
sz-=2 ;
i++ ;
}
ll res = 0 ;
for(int i=1;i<n;i++) res = max(arr[i+1] - arr[i] , res) ;
return res ;
}
else{
ll mn , mx , len , seg , a , b ;
MinMax(0 , 1e18 , &mn , &mx ) ;
// if(n == 2) return mx - mn ;
len = mx - mn + 1 ; seg = len/n ;
ll res = 0 , lst = mn ;
MinMax( mn+1 , mn + seg - 1 , &a , &b ) ;
if(a != -1) res = a - lst , lst = b ;
for(ll i=mn+seg ; i<mx ; i+=seg) {
MinMax( i+1 , min(i + seg - 1 , mx-1 ) , &a , &b ) ;
if(a > -1) res = max(res , a - lst) , lst = b ;
}
return max(res , mx - lst) ;
}
}
