#include using namespace std; typedef long long loong; map e; loong p[20];int pn; loong ae[20]; loong n,m,a,t; // 皆さんは自前のライブラリで素因数分解してください (^^) void factor(loong n){ char cmd[256]; sprintf(cmd,"factor %lld",n); FILE* f=popen(cmd,"r"); loong x; fscanf(f,"%lld:",&x); while(fscanf(f,"%lld",&x)==1){ if(++e[x]==1){ p[pn++]=x; } } fclose(f); } void find_b(loong b,int i){ if(i==pn){ loong c=m/b; if(t>a+b+c-3){ t=a+b+c-3; } }else{ for(int d=0;d<=e[p[i]]-ae[i]&&b*b<=m;++d,b*=p[i]){ find_b(b,i+1); } } } void find_a(loong a,int i){ if(i==pn){ ::a=a; m=n/a; find_b(1,0); }else{ for(int d=0;d<=e[p[i]]&&a*a*a<=n;++d,a*=p[i]){ find_a(a,i+1); } } } int main(){ cin>>n; factor(n); t=n; find_a(1,0); cout<