Submission #494006

#	Time	Username	Problem	Language	Result	Execution time	Memory
494006		Ozy	Rice Hub (IOI11_ricehub)	C++17	100 / 100	13 ms	2508 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define rep(i,a,b) for (int i = (a); i <= (b); i++)
#define repa(i,a,b) for (int i = (a); i >= (b); i--)
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "

#define MAX 100000

lli n,l,b,ini,fin,mitad,res,centro;
lli arr[MAX+2];

bool sepuede(lli num) {
    lli dif,sum = 0;

    centro = (num+1)/2;
    rep(i,1,num) sum += abs(arr[centro]-arr[i]);
    if (sum <= b) return true;

    rep(i,1,(n-num)) {

        dif = arr[centro+1] - arr[centro];

        sum -= arr[centro] - arr[i];
        if (!(num&1)) sum -= dif;
        centro++;

        sum += arr[i+num] - arr[centro];
        if (sum <= b) return true;
    }

    return false;
}

int besthub(int R, int L, int X[], long long B)
{

    n = R;
    l = L;
    rep(i,0,n-1) arr[i+1] = X[i];
    b = B;

    ini = 1;
    fin = n;
    while (ini <= fin) {
        mitad = (ini+fin)/2;

        if (sepuede(mitad)) {
            ini = mitad+1;
            res = mitad;
        }
        else fin = mitad-1;
    }

    return res;
}

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