#include <algorithm> #include <vector> #include <cfloat> #include <string> #include <cmath> #include <set> #include <cstdlib> #include <map> #include <ctime> #include <iomanip> #include <functional> #include <deque> #include <iostream> #include <cstring> #include <queue> #include <cstdio> #include <stack> #include <climits> #include <sys/time.h> #include <cctype> using namespace std; typedef long long ll; int main() { int n; cin >> n; for (int i = n-100; i <= n+100; i++) { for (int j = 2; j*j <= i; j++) { if (i%j == 0) { std::cout << i << std::endl; return 0; } } } }