#include <bits/stdc++.h>
#include "gap.h"
using namespace std;
typedef long long ll;
const ll INF = 1e18;
ll solve1(int n) {
ll a[n]={};
ll lf=-1, rf=INF+1, lp=0, rp=n-1;
while (lp <= rp) {
ll mn, mx; MinMax(lf+1, rf-1, &mn, &mx);
if (mn == -1) break;
a[lp++]=mn, a[rp--]=mx;
lf=mn, rf=mx;
}
ll ans=1;
for (int i=0; i<n-1; ++i) ans=max(ans, a[i+1]-a[i]);
return ans;
}
ll solve2(int n) {
ll lf, rf; MinMax(0, INF, &lf, &rf);
ll d=1, p=lf, ans=1;
while (p < rf) {
ll dcp=d;
ll mn=-1, mx=-1;
while (mn == -1) {
MinMax(p+1, p+dcp+1, &mn, &mx);
if (mn == -1) dcp*=2;
}
ans=max(ans, mn-p), d=ans;
p=mx;
if (rf-p <= d) break;
} return ans;
}
ll findGap(int t, int n) {
if (t == 1) return solve1(n);
return solve2(n);
}
