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Submission #861241

# Submission time Handle Problem Language Result Execution time Memory
861241 2023-10-15T17:13:51 Z sleepntsheep Rice Hub (IOI11_ricehub) C++17
0 / 100
 2 ms 2396 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <deque>
#include <set>
#include <utility>
#include <array>
#include "ricehub.h"

using namespace std;
#define ALL(x) x.begin(), x.end()
#define N 100005
using ll = long long;

int n, l, z = -1;
ll b, p[N], a[N];

int optimal_hub(int l, int r)
{
    return (l+r)/2;
}

ll sum(int l, int r)
{
    return p[r] - p[l-1];
}

ll need_budget(int l, int r, int h)
{
    if (h < l || r < h) return 1e18;
    return a[h] * (h-l+1) - a[h] * (r-h) + sum(h+1, r) - sum(l, h);
}

ll need_budget(int l, int r)
{
    return min({need_budget(l, r, optimal_hub(l, r)),
            need_budget(l, r, optimal_hub(l, r) + 1), 
            need_budget(l, r, optimal_hub(l, r) - 1)});
}

int besthub(int r, int l, int *a, ll b)
{
    for (int i = 1; i <= n; ++i) 
    {
        p[i] = p[i-1] + a[i-1];
        int l = 1, r = i;
        while (l <= r)
        {
            int y = (l+r)/2;
            if (need_budget(y, i) <= b)
                z = max(z, i-y+1), r = y - 1;
            else l = y + 1;
        }
    }
    return z;
}

Subtask #1
0 / 17.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 2392 KB Output isn't correct
2 Halted 0 ms 0 KB -