#include "gap.h"
#include<bits/stdc++.h>
using namespace std;
#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second
// #define int long long
typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;
long long findGap(int T, int N) {
long long qn, qx;
auto ask = [&](long long l, long long r) -> void {
assert(l <= r);
MinMax(l, r, &qn, &qx);
};
long long sus1 = 0, sus2 = (long long)1e18;
ask(sus1, sus2);
long long mn = qn, mx = qx, ans = 0;
long long d = (mx - mn + N - 1) / N;
long long ls = mn, l = mn + 1;
while(l <= mx) {
long long r = l + d - 1;
ask(l, r);
if(qn != -1) {
ans = max(ans, qn - ls);
ls = qx;
}
l = r + 1;
}
return ans;
}
