#include<bits/stdc++.h> using namespace std; int main(){ string a,b; int t,f,ss=1;cin>>t; while(t--){ cin>>a>>b; printf("Case #%d:\n",ss++); if(a==b){ cout<<0<<endl; continue; } if(a.size()>b.size())f=0; else if(a.size()<b.size())f=1; else if(a>b)f=0; else f=1; if(f)swap(a,b); int lx=a.size()-b.size(); while(lx--)b='0'+b; int l=a.size(),flag=0,p=0; while(l--){ a[l]='0'+a[l]-b[l]-flag; if(a[l]-'0'<0){ a[l]+=10;flag=1; } else flag=0; } if(f)cout<<'-'; while(a[p]=='0')p++; for(int i=p;i<a.size();++i) cout<<a[i]; cout<<endl; } } |
Double click to view unformatted code.