Submission #1276125

#	Time	Username	Problem	Language	Result	Execution time	Memory
1276125		k12_khoi	Rice Hub (IOI11_ricehub)	C++17	Compilation error	0 ms	0 KiB

ricehub

#include "ricehub.h"

#include <bits/stdc++.h>
using namespace std;

#define ll long long

const int N=1e5+5;

int n,x,l,r,mid; ll limit;
ll a[N],pre[N];

ll C(int l,int r,int mid)
{
    return (pre[r+1]-pre[mid+1])-(r-mid)*a[mid]+a[mid]*(mid-l+1)-(pre[mid+1]-pre[l]);
}

int besthub(int n,int x,ll a[],ll limit)
{
    int res=0;

    pre[0]=0;
    for (int i=1;i<=n;i++)
    pre[i]=pre[i-1]+a[i-1];

    for (int i=0;i<n;i++)
    {
        l=(res+1)/2;
        r=min(i,n-1-i);

        while (l<=r)
        {
            mid=(l+r)/2;

            if (C(i-mid,i+mid,i)<=limit)
            {
                res=mid*2+1;
                l=mid+1;
            }
            else r=mid-1;
        }

        l=res/2;
        r=min(i,n-2-i);

        while (l<=r)
        {
            mid=(l+r)/2;
            if (C(i-mid,i+mid+1,i)<=limit)
            {
                res=mid*2+2;
                l=mid+1;
            }
            else r=mid-1;
        }
    }

    return res;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cce0zykn.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