OJ-Problems-Source/HDOJ/4091_autoAC.cpp

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#include <cstdio>
#include <cstring>
#include <cmath>
#include <iostream>
#include <algorithm>
using namespace std;
typedef __int64 LL;
LL gcd(LL a,LL b)
{
return b==0?a:gcd(b,a%b);
}
LL lcm(LL a,LL b)
{
return a/gcd(a,b)*b;
}
int main()
{
LL n,s1,v1,s2,v2;
LL T,tt=0;
cin>>T;
while(T--)
{
LL i,j,k,ans,p,q,m,num;
cin>>n>>s1>>v1>>s2>>v2;
m=lcm(s1,s2);
num=n/m;
if(num){num--;}
if(v1*s2>=v2*s1)
{
num=m/s1*num;
p=(n-num*s1)/s2;
ans=num*v1+p*v2;
if(s1>=s2)
{
for(i=num;i*s1<=n;i++)
{
q=i*v1+(n-i*s1)/s2*v2;
if(q>ans)ans=q;
}
}
else
{
for(i=p;i>=0;i--)
{
q=i*v2+(n-i*s2)/s1*v1;
if(q>ans)ans=q;
}
}
}
else
{
num=m/s2*num;
p=(n-num*s2)/s1;
ans=num*v2+p*v1;
if(s2>=s1)
{
for(i=num;i*s2<=n;i++)
{
q=i*v2+(n-i*s2)/s1*v1;
if(q>ans)ans=q;
}
}
else
{
for(i=p;i>=0;i--)
{
q=i*v1+(n-i*s1)/s2*v2;
if(q>ans)ans=q;
}
}
}
cout<<"Case #"<<++tt<<": "<<ans<<endl;
}
return 0;
}