Submission #914773

#	Time	Username	Problem	Language	Result	Execution time	Memory
914773		DucNguyen2007	Rice Hub (IOI11_ricehub)	C++14	100 / 100	11 ms	3672 KiB

ricehub

#include<bits/stdc++.h>
using namespace std;
#define ll long long
const int maxN=1e5+5;
ll sum[maxN+1];
int a[maxN+1];
ll get(ll l,ll r)
{
    if(l==0)
    {
        return sum[r];
    }
    else return sum[r]-sum[l-1];
}
bool check(ll len,int n,ll B,int a[])
{
    ll l=0,r=len-1;
    while(r<n)
    {
        ll p=(l+r)/2;
        ll cur=(p-l+1)*a[p]-get(l,p)+get(p,r)-(r-p+1)*a[p];
        if(cur<=B)
        {
            return true;
        }
        l++;
        r++;
    }
    return false;
}
ll besthub(int n,int L,int a[],ll B)
{
    sum[0]=a[0];
    for(int i=1;i<n;i++)
    {
        sum[i]=sum[i-1]+a[i];
    }
    ll res,l=1,r=n;
    while(l<=r)
    {
        ll mid=(l+r)/2;
        if(check(mid,n,B,a))
        {
            res=mid;
            l=mid+1;
        }
        else r=mid-1;
    }
    return res;
}

/*5 20 6
1 2 10 12 14*/

Compilation message (stderr)

ricehub.cpp: In function 'long long int besthub(int, int, int*, long long int)':
ricehub.cpp:49:12: warning: 'res' may be used uninitialized in this function [-Wmaybe-uninitialized]
   49 |     return res;
      |            ^~~

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