Submission #255141

#	Time	Username	Problem	Language	Result	Execution time	Memory
255141		SamAnd	Rice Hub (IOI11_ricehub)	C++17	100 / 100	19 ms	2944 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define fi first
#define se second
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(),(x).end()
typedef long long ll;
const int N = 100005;

int n, d;
int x[N];
ll b;

ll p[N];

bool stg(int q)
{
    for (int l = 1; l <= n - q + 1; ++l)
    {
        int r = l + q - 1;
        int m = (l + r) / 2;

        ll yb = 0;
        yb += (m - l + 1) * 1LL * x[m];
        yb -= (p[m] - p[l - 1]);
        yb += (p[r] - p[m - 1]);
        yb -= (r - m + 1) * 1LL * x[m];
        if (yb <= b)
            return true;
    }
    return false;
}

int solv()
{
    for (int i = 1; i <= n; ++i)
        p[i] = p[i - 1] + x[i];
    int ans = 0;
    int l = 1, r = n;
    while (l <= r)
    {
        int m = (l + r) / 2;
        if (stg(m))
        {
            ans = m;
            l = m + 1;
        }
        else
        {
            r = m - 1;
        }
    }
    return ans;
}

int besthub(int R, int L, int X[], ll B)
{
    n = R;
    d = L;
    for (int i = 1; i <= n; ++i)
        x[i] = X[i - 1];
    b = B;
    return solv();
}

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