#9

#include <bits/stdc++.h>
using namespace std;
#define ll long long
int n,k;
ll a[200005];

ll find()
{
    ll l=1,r=2000000000LL;
    while (l<=r)
    {
        ll m=(l+r)/2;
        ll x=0;
        for (int i=n/2+1;i<=n;i++)
        {
            x+=max(0LL,m-a[i]);
        }
        if (x<=k) l=m+1;
        else r=m-1;
    }
    return r;
}

int main()
{

    scanf("%d%d",&n,&k);
    for (int i=1;i<=n;i++)
    {
        scanf("%I64d",&a[i]);
    }
    sort(a+1,a+n+1);
    int x=find();
    cout<<x<<endl;
    return 0;
}

Main.cpp: In function ‘int main()’:
Main.cpp:30:28: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘long long int*’ [-Wformat=]
         scanf("%I64d",&a[i]);
                       ~~~~~^
Main.cpp:27:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~
Main.cpp:30:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%I64d",&a[i]);
         ~~~~~^~~~~~~~~~~~~~~