#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define REP(i,n) for(long (i)=0;(i)<(n);(i)++) #define FOR(i,a,b) for(long (i)=(a);(i)<(b);(i)++) #define RREP(i,a) for(long (i)=(a)-1;(i)>=0;(i)--) #define FORR(i,a,b) for(long (i)=(a)-1;(i)>=(b);(i)--) #define MOD 1000000007 #define PI acos(-1.0) #define DEBUG(C) cout< #define PLL pair #define ALL(a) (a).begin(),(a).end() #define SORT(a) sort((a).begin(),(a).end()) #define RSORT(a) sort((a).begin(),(a).end(),greater()) typedef long long LL; typedef unsigned long long ULL; using namespace std; int main(void){ LL N; cin>>N; LL tmin=N-1; for(LL i=1;i*i*i<=N;i++){ LL nbufi=N,a,b,c; if(nbufi%i) continue; a=i; nbufi/=a; //for(LL j=1;j*j<=nbufi;j++){ for(LL j=(LL)(sqrt(nbufi)+0.5);j>=i;j--){ LL nbufj=nbufi; if(nbufj%j) continue; b=j; c=nbufj/b; tmin=min(tmin,(LL)a+b+c-3); break; // } } cout<