#include<iostream>
using namespace std;
int main()
{
	int n;
	cin>>n;
	for(int i=1;i<=n;++i){
		string a;
		int l,s;
		cin>>s;
		getline(cin,a);
		l=a.length();
		if(a[l-1]=='m'&&a[l-2]=='m'&&a[l-8]=='m'&&a[l-9]=='k'){
			cout<<s;
			cout<<" km = ";
			s*=1000000;
			cout<<s;
			cout<<" mm"<<endl;
		}
		else if(a[l-1]=='m'&&a[l-2]=='m'&&a[l-8]=='m'){
			cout<<s;
			cout<<" m = ";
			s*=1000;
			cout<<s;
			cout<<" mm"<<endl;
		}
		else if(a[l-1]=='g'&&a[l-2]=='m'&&a[l-8]=='g'&&a[l-9]=='k'){
			cout<<s;
			cout<<" kg = ";
			s*=1000000;
			cout<<s;
			cout<<" mg"<<endl;
		}
		else if(a[l-1]=='g'&&a[l-2]=='m'&&a[l-8]=='g'){
			cout<<s;
			cout<<" g = ";
			s*=1000;
			cout<<s;
			cout<<" mg"<<endl;
		}
		else if(a[l-1]=='m'&&a[l-7]=='m'&&a[l-8]=='k'){
			cout<<s;
			cout<<" km = ";
			s*=1000;
			cout<<s;
			cout<<" m"<<endl;
		}
		else if(a[l-1]=='g'&&a[l-7]=='g'&&a[l-8]=='k'){
			cout<<s;
			cout<<" kg = ";
			s*=1000;
			cout<<s;
			cout<<" g"<<endl;
		}
	}
}

看这里

想必大佬们已经知道发生了何等惨案