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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int a,b,c,d,e,f,i,j,k,l;
- cin>>f;
- for(l=1; l<=f; l++)
- {
- d=0;
- c=0;
- cin>>a>>b;
- cout<<"Case "<<l<<": ";
- if(a==1 || b==1)
- {
- d=a*b;
- }
- else if(a==2 || b==2)
- {
- c=max(a,b);
- if(c%4==1 || c%4==3)
- {
- d=c+1;
- }
- else if(c%4==2)
- {
- d=c+2;
- }
- else
- {
- d=c;
- }
- }
- else
- {
- if(a*b%2==0)
- {
- d=(a*b)/2;
- }
- else
- {
- d=1+(a*b)/2;
- }
- }
- cout<<d<<endl;
- }
- return 0;
- }
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