#include<bits/stdc++.h>
#include "gap.h"
using namespace std;
#define ll long long
#define pii pair<int,int>
#define fi first
#define se second
const int M = 1e5+5;
ll a[M];
ll findGap(int T, int N){
if(T == 1){
ll mn,mx;
MinMax(1,1e18,&mn,&mx);
a[1] = mn;
a[N] = mx;
for(int i = 2; i <= (N+1)/2; i++){
ll mnn,mxx;
MinMax(a[i-1]+1,a[N-i+2]-1,&mnn,&mxx);
a[i] = mnn;
a[N-i+1] = mxx;
}
ll ans = 0;
for(int i = 2; i <= N; i++) ans = max(ans,a[i]-a[i-1]);
return ans;
}
else{
ll mn,mx;
MinMax(1,1e18,&mn,&mx);
a[1] = mn;
a[N] = mx;
ll gap = (mx-mn+N-2)/(N-1);
ll ans = gap;
ll cur = a[1];
ll sta = a[1]+1;
while(true){
ll mnn,mxx;
ll l = sta;
ll r = min(l+gap,a[N]);
MinMax(l,r,&mnn,&mxx);
if(mnn != mxx){
ans = max(ans,mnn-cur);
cur = mxx;
}
else{
if(mnn != -1){
ans = max(ans,mnn-cur);
cur = mnn;
}
}
sta += gap+1;
if(r == a[N]) break;
}
return ans;
}
}
