#include using namespace std; typedef signed long long ll; #undef _P #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) //------------------------------------------------------- int N,C,V; ll A[505050]; void solve() { int i,j,k,l,r,x,y; string s; cin>>N>>C>>V; for(i=1;i<=50000;i++) A[i]=1LL<<60; ll mi=1LL<<60; A[1]=0; for(i=1;i<=2*N;i++) { if(i>=N) mi=min(mi,A[i]); for(j=2*i;j<=2*N;j+=i) { A[j]=min(A[j],A[i]+C+1LL*(j/i-1)*V); } } cout<