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  1. #include <bits/stdc++.h>
  2. #define int long long
  3. #define endl '\n'
  4. #define Deghish ios_base::sync_with_stdio(false);cin.tie(NULL);
  5. using namespace std;
  6. bool isPrime(int n) {
  7.     if (n<2) return false;
  8.     for (int i = 2; i*i <= n; i++) {
  9.         if (n%i == 0) return false;
  10.     }
  11.     return true;
  12. }
  13. vector<int> prim;
  14. void fill() {
  15.     int k = 2;
  16.     while (prim.size() <= 10005) {
  17.         if (isPrime(k)) prim.push_back(k);
  18.         k++;
  19.     }
  20. }
  21. int get_sqrt(int n) {
  22.     int sqr = sqrtl(n);
  23.     while ((sqr + 1) * (sqr + 1) <= n) sqr++;
  24.     while (sqr * sqr > n) sqr--;
  25.     return sqr;
  26. }
  27.  
  28. vector<int>nextMax(vector<int>a) {
  29.     vector<int>res(a.size(),-1);
  30.     stack<int>st;
  31.     for (int i = 0; i < a.size(); ++i) {
  32.         while (!st.empty()&&a[st.top()]<a[i]) {
  33.             res[st.top()]=i;
  34.             st.pop();
  35.         }
  36.         st.push(i);
  37.     }
  38.     return res;
  39. }
  40. void solve() {
  41.     int n,t;cin>>n>>t;
  42.     vector<int>a(n);
  43.     int l=1,h=1e9;
  44.     for (auto &i:a)cin>>i;
  45.     int ans=0;
  46.     while (l<=h) {
  47.         int mid=l+(h-l)/2;
  48.         int x=0;
  49.         for (auto i:a) {
  50.             x+=mid/i;
  51.         }
  52.         if (x>=t) {
  53.             ans=mid;
  54.             h=mid-1;
  55.         }
  56.         else l=mid+1;
  57.  
  58.     }
  59.     cout<<ans;
  60. }
  61. signed main() {
  62.     Deghish
  63.     int Tc = 1;//cin >> Tc;
  64.     while (Tc--) {
  65.         solve();
  66.     }
  67.     return 0;
  68. }
  69.  
  70.  
Success #stdin #stdout 0s 5320KB
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https://ideone.com/FfXJLl
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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