Submission #1003244

#	Time	Username	Problem	Language	Result	Execution time	Memory
1003244		vjudge1	Rice Hub (IOI11_ricehub)	C++17	100 / 100	15 ms	2396 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
vector<ll> pr, x;
ll check(ll l, ll r, ll mid){
  ll su = x[mid] * (mid - l + 1) - (pr[mid] - pr[l - 1]);
  su += (pr[r] - pr[mid]) - x[mid] * (r - mid);
  return su; 
}
int besthub(int R, int L, int X[], long long B)
{
  pr.assign(R + 1, 0), x.assign(R + 1, 0);
  for (int i = 1; i <= R; i++){
    x[i] = X[i - 1];
    pr[i] = pr[i - 1] + x[i];
  }
  ll l = 1, r = 1, ans = 0;
  while(r <= R){
    if ((l + r) % 2 == 1){
      int mi1 = (l + r) / 2, mi2 = (l + r) / 2 + 1;
      ll va1 = check(l, r, mi1), va2 = check(l, r, mi2);
      if (l == 2 && r == 5){
        cout<<va1<<" "<<va2;
      }
      if (va1 > va2){
        swap(va1, va2);
      }
      if (va1 > B){
        l++;
      }
      else if (va1 <= B){
        r++;
        ans = max(ans, (r - l));
      }
    }
    else{
      int mi = (l + r) / 2;
      ll va = check(l, r, mi);
      if (va > B){
        l++;
      }
      else{
        r++;
        ans = max(ans, (r - l));
      }
    }
  }
  return ans;
}

• Subtask 1: 17 / 17
• Subtask 2: 25 / 25
• Subtask 3: 26 / 26
• Subtask 4: 32 / 32