#include "gap.h"
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 1e18;
pair<int,int> qry(int le, int ri)
{
pair<int,int> aux;
MinMax(le,ri,&aux.first,&aux.second);
return aux;
}
long long findGap(int32_t T, int32_t N)
{
int rez=1;
pair<int,int> tot = qry(0,INF);
int cur=tot.first;
while(tot.second - cur > rez)
{
pair<int,int> aux = qry(cur+1,cur+rez);
if(aux.first!=-1)
{
cur = aux.second;
continue;
}
int c=rez;
while(1)
{
c=(c+1)*2;
aux = qry(cur+1,cur+c);
if(aux.first!=-1)
{
rez = max(rez, aux.first - cur);
cur = aux.second;
break;
}
}
}
return rez;
}
