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#include <vector> #include <set> #include <map> #include <iostream> using namespace std; const int maxn = 33; typedef long long ll; ll a[maxn]; ll k; int n; bool check(ll x) { ll sum = 0; for(int i = 0; i < n; i++) { sum += x / a[i]; } return sum >= k; } int main() { cin >> n >> k; for(int i = 0; i < n; i++) { cin >> a[i]; } ll L = 0, R = 1e17; ll res = 1e18; while(L <= R) { ll mid = (L + R) / 2; if(check(mid)) { R = mid - 1; res = min(res, mid); } else { L = mid + 1; } } cout << res << endl; return 0; }
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