#include <iostream>
#include <vector>
#include <cstdio>
#include <algorithm>
using namespace std;/************** Multi *********************/
string multi(string aa,string bb){string a = aa,b=bb,c;int la,lb;la = a.length();lb = b.length();c.resize(la+lb);for(int i=0;i<la+lb;i++){c[i] = '0';}//c[la+lb] = '\0';int carry = 0,v;reverse(a.begin(),a.end());reverse(b.begin(),b.end());for(int i=0;i<a.length();i++){for(int j=0;j<b.length();j++){v = carry + (a[i]-'0')* (b[j]-'0') + (c[i+j]-'0');c[i+j] = '0' + v%10;carry = v/10;if(j==b.length()-1){c[i+j+1] = '0' + carry;carry = 0;}}}reverse(c.begin(),c.end());return c;
}/************** Add *********************/
string add(string aa,string bb){string a = aa,b=bb,c;reverse(a.begin(),a.end());reverse(b.begin(),b.end());int la,lb;la = a.length();lb = b.length();int lc = la>lb?la:lb;int v;c.resize(0);int carry = 0;for(int i=0;i<lc;i++){if(i>=la&&i<lb){v = carry + (b[i]-'0');}else if(i>=lb&&i<la){v = carry + (a[i]-'0');}else if(i<la&&i<lb){v = carry + (a[i]-'0') + (b[i]-'0');}c.push_back('0' + v%10);carry = v/10;if(i==lc-1){c.push_back(carry + '0');carry = 0;}}reverse(c.begin(),c.end());return c;
}/************** Sub *********************/
string sub(string aa,string bb){string a = aa,b=bb,c;reverse(a.begin(),a.end());reverse(b.begin(),b.end());c.resize(0);int borrow = 0;bool sign = false;int v;if(a.length()<b.length()){swap(a,b);sign = true;}else if(a.length()==b.length()){for(int i=a.length()-1;i>=0;i--){if(a[i]<b[i]){swap(a,b);sign = true;break;}}}for(int i=0;i<a.length();i++){if(i>=b.length()){v = (a[i] - '0') - borrow;if(v>=0){c.push_back(v+'0');borrow = 0;}else{v += 10;borrow = 1;c.push_back('0'+v);}}else{v = (a[i]-'0') - (b[i] - '0') - borrow;if(v>=0){c.push_back(v+'0');borrow = 0;}else{v += 10;borrow = 1;c.push_back('0'+v);}}}if(sign){c = c + "-";}reverse(c.begin(),c.end());return c;
}void print(string s){bool flag = false;for(int i=0;i<s.length();i++){if((s[i]!='0'&&s[i]!='-')||(s[i]=='0'&&flag)){flag = true;cout<<s[i];}if(s[i]=='-'){cout<<s[i];}}if(!flag){cout<<"0";}cout<<endl;
}int main(int argc,char* argv[]){string a,b,c;while(cin>>a>>b){c = add(a,b);print(c);c = sub(a,b);print(c);c = multi(a,b);print(c);}return 0;
}