#include<bits/stdc++.h>
#include"gap.h"
using namespace std;
#define int long long
#define pb push_back
#define st first
#define nd second
#define pii pair<int, int>
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
long long findGap(int32_t t, int32_t n) {
if(t==1) {
vector<int> a;
vector<int> b;
int l = 0;
int r = 1e18;
for(int i=0;i<(n+1)/2;i++) {
int x, y;
MinMax(l, r, &x, &y);
a.pb(x);
b.pb(y);
l = x+1;
r = y-1;
}
reverse(all(b));
for(int x:b) a.pb(x);
int ans = 0;
for(int i=0;i<sz(a)-1;i++) {
ans = max(ans, a[i+1]-a[i]);
}
return ans;
}
int l, r;
MinMax(0, 1e18, &l, &r);
int cur = l;
int jump = 1;
int ans = 0;
while(cur!=r) {
int x, y;
MinMax(cur+1, cur+jump, &x, &y);
if(x!=-1) {
ans = max(ans, x-cur);
cur = y;
}
jump*=2;
}
return ans;
}
