Language: C++

#include<bits/stdc++.h>
#define rep(a,b,c) for(int a=b;a<=c;a++)
#define per(a,b,c) for(int a=b;a>=c;a--)
#define ios; ios::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define mk make_pair
#define fi first
#define se second
#define mem(a,b) memset(a,b,sizeof(a))
#define inf 0x3f3f3f3f
#define INF 0x3f3f3f3f3f3f3f3f
#define ls(x) (x<<1)
#define rs(x) (ls(x)|1)
#define eps 1e-11
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll,ll> pll;
typedef pair<int,int> pii;
typedef vector<int> VI;
typedef double db;
mt19937 rnd(random_device{}());
const int mod = 998244353;
const int N = 1e6 + 5;
const int M = 1e6 + 5;
inline ll gcd(ll a,ll b){ return b?gcd(b,a%b):a;}
inline ll lcm(ll a,ll b){ return a*b/gcd(a,b); }
inline ll ksm(ll x,ll y){ ll res=1; while(y){if(y&1) res=res*x%mod;
x=x*x%mod; y>>=1;} return res; }
int n, m, k;
int a[N];

bool ok(ll x){
    ll cnt=0;
    rep(i,1,n){
        cnt+=(a[i]+x-1)/x-1;
    }
    return cnt<=k;
}

int main(){
    cin>>n>>k;
    ll r=0;
    rep(i,1,n) cin>>a[i], r=max(r,a[i]);
    ll l=0, ans;
    while(l<=r){
        ll mid=l+r>>1;
        if(ok(mid)) ans=mid, r=mid-1;
        else l=mid+1;
    }
    printf("%lld\n",ans);
    return 0;
}
/*
2
1 5 10
2 15 5
3
2 93 78
1 71 59
3 57 96
*/
//
//                            _ooOoo_
//                           o8888888o
//                           88" . "88
//                           (| -_- |)
//                           O\  =  /O
//                        ____/`---'\____
//                      .'  \|     |//  `.
//                     /  \|||  :  |||//  \
//                    /  _||||| -:- |||||-  \
//                    |   | \  -  /// |   |
//                    | \_|  ''\---/''  |   |
//                    \  .-\__  `-`  ___/-. /
//                  ___`. .'  /--.--\  `. . __
//               ."" '<  `.___\_<|>_/___.'  >'"".
//              | | :  `- \`.;`\ _ /`;.`/ - ` : | |
//              \  \ `-.   \_ __\ /__ _/   .-` /  /
//         ======`-.____`-.___\_____/___.-`____.-'======
//                            `=---='
//        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
//                     佛祖保佑      永无BUG


Compiler output:
a.cc:4:9: warning: ISO C++11 requires whitespace after the macro name
    4 | #define ios; ios::sync_with_stdio(false); cin.tie(0);
      |         ^~~
a.cc: In function 'int main()':
a.cc:44:32: error: no matching function for call to 'max(ll&, int&)'
   44 |     rep(i,1,n) cin>>a[i], r=max(r,a[i]);
      |                             ~~~^~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:44:32: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   44 |     rep(i,1,n) cin>>a[i], r=max(r,a[i]);
      |                             ~~~^~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:44:32: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   44 |     rep(i,1,n) cin>>a[i], r=max(r,a[i]);
      |                             ~~~^~~~~~~~