#include #include using namespace std; #define reps(i,s,n) for(int i = s; i < n; i++) #define rep(i,n) reps(i,0,n) #define Rreps(i,n,e) for(int i = n - 1; i >= e; --i) #define Rrep(i,n) Rreps(i,n,0) #define ALL(a) a.begin(), a.end() #define fi first #define se second typedef long long ll; typedef vector vec; typedef vector mat; ll N,M,H,W,Q,K,A,B; string S; typedef pair P; const ll INF = (1LL<<58); template bool chmin(T &a, const T &b){ if(a > b) {a = b; return true;} else return false; } template bool chmax(T &a, const T &b){ if(a < b) {a = b; return true;} else return false; } int main() { cin>>N; ll ans = INF; reps(i, 2, 120){ ll temp = 1, num = 0; if(i < 8){ while(N > temp){ temp *= i; ++num; } }else{ while(temp < ll(1e+15) && N > temp){ temp *= i; ++num; } } chmin(ans, num * i); } cout<