#include <iostream>#include <string>#include <stack>#include <vector>using namespace std;const __int64 mod=10000000;struct BigNum{__int64 a[300];BigNum(){a[0]=1;a[1]=0;}BigNum(int x){if(x>=mod) a[0]=2,a[1]=x/mod,a[2]=x%mod;else a[0]=1,a[1]=x;}BigNum(__int64 x){stack<__int64> s;while(x){s.push(x%mod);x/=mod;}a[0]=s.size();int k=0;while(!s.empty()){a[++k]=s.top();s.pop();}}BigNum(string str){int i;for(i=0;i<str.length();i++) if(str[i]!='0') break;if(i==str.length()) {a[0]=1;a[1]=0;return;}str=str.substr(i,str.length()-i);int p=str.length()%7,j;__int64 k;a[0]=0;if(p){a[0]=1;k=0;for(i=0;i<p;i++) k=k*10+str[i]-'0';a[1]=k;str=str.substr(p,str.length()-p);}for(i=0;i<str.length();){k=0;for(j=i;j<i+7;j++) k=k*10+str[j]-'0';a[++a[0]]=k;i=j;}}BigNum operator+(BigNum temp){BigNum ans;__int64 i,j,k,p;if(a[0]>temp.a[0]) p=a[0];else p=temp.a[0];for(i=a[0],j=temp.a[0],k=p;j>=1&&i>=1;i--,j--,k--)ans.a[k]=a[i]+temp.a[j];if(j==0){while(i>=1) ans.a[i]=a[i--];}else{while(j>=1) ans.a[j]=temp.a[j--];}ans.a[0]=0;for(i=p;i>=1;i--) {ans.a[i-1]+=ans.a[i]/mod;ans.a[i]%=mod;}if(ans.a[0]){for(i=p+1;i>=1;i--) ans.a[i]=ans.a[i-1];ans.a[0]=p+1;}else ans.a[0]=p;return ans;}BigNum operator-(BigNum temp){BigNum ans;int i,j;for(i=0;i<=a[0];i++) ans.a[i]=a[i];for(i=ans.a[0],j=temp.a[0];i>=1&&j>=1;i--,j--)ans.a[i]-=temp.a[j];for(i=ans.a[0];i>=1;i--) if(ans.a[i]<0){ans.a[i]+=mod;ans.a[i-1]--;}for(i=1;i<=a[0];i++) if(ans.a[i]) break;if(i>a[0]) {ans.a[0]=1;ans.a[1]=0;return ans;}for(j=i;j<=a[0];j++) ans.a[j+1-i]=ans.a[j];ans.a[0]=a[0]-i+1;return ans;}BigNum operator*(BigNum temp){BigNum ans;int i,j,p=a[0]+temp.a[0]-1;memset(ans.a,0,sizeof(ans.a));for(i=a[0];i>=1;i--) for(j=temp.a[0];j>=1;j--)ans.a[i+j-1]+=a[i]*temp.a[j];ans.a[0]=0;for(i=p;i>=1;i--){ans.a[i-1]+=ans.a[i]/mod;ans.a[i]%=mod;}if(ans.a[0]){for(i=p;i>=0;i--) ans.a[i+1]=ans.a[i];ans.a[0]=p+1;}else ans.a[0]=p;return ans;}BigNum operator/(int x){BigNum ans;int i,j;__int64 p;for(i=1;i<=a[0];i++){if(i==1){ans.a[i]=a[i]/x;p=a[i]%x;}else{ans.a[i]=(p*mod+a[i])/x;p=(p*mod+a[i])%x;}}for(i=1;i<=a[0];i++) if(ans.a[i]) break;if(i>a[0]) {ans.a[0]=1;ans.a[1]=0;return ans;}for(j=i;j<=a[0];j++) ans.a[j+1-i]=ans.a[j];ans.a[0]=a[0]-i+1;return ans;}int operator==(BigNum temp){if(a[0]!=temp.a[0]) return 0;for(int i=1;i<=a[0];i++) if(a[i]!=temp.a[i]) return 0;return 1;}int operator>(BigNum temp){if(a[0]>temp.a[0]) return 1;if(a[0]<temp.a[0]) return 0;for(int i=1;i<=a[0];i++) if(a[i]!=temp.a[i]) return a[i]>temp.a[i];return 0;}int operator<(BigNum temp){if(a[0]<temp.a[0]) return 1;if(a[0]>temp.a[0]) return 0;for(int i=1;i<=a[0];i++) if(a[i]!=temp.a[i]) return a[i]<temp.a[i];return 0;}int operator<=(BigNum temp){BigNum p;for(int i=0;i<=a[0];i++) p.a[i]=a[i];return !(p>temp);}int operator>=(BigNum temp){BigNum p;for(int i=0;i<=a[0];i++) p.a[i]=a[i];return !(p<temp);}void print(){printf("%I64d",a[1]);for(int i=2;i<=a[0];i++) printf("%07d",(int)a[i]);}};BigNum low,high,mid,ans,p,temp,temp1;string str;void print(BigNum a){vector<int> V;int i,j;for(i=a.a[0];i>=1;i--) {if(i>1){for(j=1;j<=7;j++){V.push_back((int)(a.a[i]%10));a.a[i]/=10;}}else{while(a.a[i]) {V.push_back((int)(a.a[i]%10));a.a[i]/=10;}}}j=0;for(i=0;i<V.size();i++) j+=V[i];printf("%d ",j%10);for(i=V.size()-1;i>=10;i--) printf("%d",V[i]);putchar('.');for(i=9;i>=0;i--) printf("%d",V[i]);puts("");}int main(){while(cin>>str){p=BigNum(str);int i;for(i=1;i<=30;i++) p=p*BigNum(10);low=BigNum(1);high=p;while(low<=high){mid=(low+high)/2;temp=mid*mid*mid;if(temp>=p) high=mid-BigNum(1);else low=mid+BigNum(1);}temp=low*low*low;temp1=high*high*high;if(temp==p) print(low);else if(temp1==p) print(high);else if(temp<p) print(low);else print(high);}return 0;}
