This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "bits/stdc++.h"
#include "gap.h"
using namespace std;
long long findGap(int T, int N){
if(N <= 8 || T == 1){
vector <long long> A(N);
MinMax(0 ,1e18 ,&A[0] ,&A[N-1]);
for(int i=1; i<(N+1)/2; i++)
MinMax(A[i-1]+1 ,A[N-i]-1 ,&A[i] ,&A[N-i-1]);
long long ret = 1;
for(int i=1; i<N; i++)
ret = max(ret ,A[i]-A[i-1]);
return ret;
}
long long mn ,mx ,mx_dist = 1;
MinMax(0 ,1e18 ,&mn ,&mx);
long long d = (mx-mn)/(N-1) ,lst = mn;
for(long long s,t,p=mn+1; p<mx; p+=d){
MinMax(p ,min(mx ,p+d)-1 ,&s ,&t);
if(s != -1){
mx_dist = max(mx_dist ,s-lst);
lst = t;
}
}
return max(mx-lst ,mx_dist);
}
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