#include <bits/stdc++.h> using namespace std; bool check(int k, vector<long long>&pref, int R, long long B){ long long min_wyn = LLONG_MAX; int n = R - k + 1; for(int l = 1; l<=n; l++){ int r = l + k - 1; int m = l + (k/2); long long temp_wyn = (m - l)*pref[m] - (pref[m] - pref[l-1]); temp_wyn += (pref[r] - pref[m]) - (r - (m+1) + 1)*pref[m]; min_wyn = min(min_wyn, temp_wyn); } if(min_wyn <= B)return true; else return false; } long long besthub(int R, int L, vector<int>&X, long long B){ if(B == 0)return 0; vector<long long>pref(R+7, 0); for(int i = 1; i<=R; i++)pref[i] = pref[i-1] + X[i-1]; int l = 1; int r = R; int wyn = 0; while(l<=r){ int mid = (l+r)/2; if(check(mid, pref, R, B)){ l = mid + 1; wyn = max(wyn, mid); } else r = mid - 1; } return wyn; }

/usr/bin/ld: /tmp/ccyyL8Ay.o: in function `main':
grader.cpp:(.text.startup+0xaa): undefined reference to `besthub(int, int, int*, long long)'
collect2: error: ld returned 1 exit status