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- #include<bits/stdc++.h>
- using namespace std;
- typedef long long int ll;
- int main()
- {
- ll t,i,cas,j,k,X,N,M,Y,a,b,c,d,e;
- cin>>t;
- for(cas=1;cas<=t;cas++)
- {
- cin>>X>>N>>Y>>M;
- a=X;
- b=0;
- if(N==0)
- a+=Y;
- for(i=1;i<=N;i++)
- {
- if(a<b)
- swap(a,b);
- b+=a;
- if(i==N)
- {
- if(a<b)
- swap(a,b);
- a+=Y;
- }
- }
- cout<<"Case "<<cas<<": "<<__gcd(a,b)<<endl;
- }
- return 0;
- }
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