题解

#include<bits/stdc++.h>
using namespace std;
int n[114][514],n1[114][514];
int main(){
	long long a;
	cin>>a;
	for(int i=1;i<=a;i++){
		long long z_=0,_1=0,_2=0,b=0;
		cin>>z_>>_1>>_2;
		if(_1<=_2*1.0/2)cout<<z_*_1<<endl;
		else if(_2*1.0/2<_1){
			if(z_%2==1)cout<<z_/2*_2+_1<<endl;
			else cout<<z_/2*_2<<endl;
		}
	}
    return 0;
}