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 "ricehub.h"
#include <bits/stdc++.h>
using namespace std;
int besthub(int R, int L, int x[], long long B)
{
vector<long long>X(R+1);
X[0] = -(long long)1e18;
for (int i = 1; i <= R; i++){
X[i] = x[i - 1];
}
int l = 1, r = R;
long long pf[R+1];
pf[0] = 0;
for (int i = 1; i<=R; i++){
pf[i] = pf[i - 1] + X[i];
}
function<bool(int)>check = [&](int mid){
int r = 0;
int l = 1;
while(r + 1 <= R){
++r;
while(r - l + 1 > mid){
++l;
}
long long avg = pf[r] - pf[l - 1];
if (r - l + 1 == mid){
int itt = upper_bound(X.begin(), X.end(), avg) - X.begin();
for (auto it : {itt,itt-1}){
if (it < l || it > r)continue;
long long sum = 0;
if (it != l){
sum += (it - l) * X[it] - (pf[it-1] - pf[l-1]);
}
if (it != r){
sum += -(r - it) * X[it] + (pf[r] - pf[it]);
}
if (sum <= B)return true;
}
}
}
return false;
};
while(l<=r){
int mid = (l+r) / 2;
if (check(mid)){
l = mid + 1;
}else{
r = mid - 1;
}
}
return l - 1;
}
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