> #include<iostream>
> using namespace std;
> int main()
> {
> 	int d,s,mint,m,t,x,a;
> 	while(cin>>t>>x){
> 		cin>>m;
> 		if(m==0) cout<<t*x<<endl;
> 		else{
> 			mint=100000000;
> 			while(m--)
> 			{
> 				cin>>d>>s;
> 				a=(d-1)/s;
                                    ~~~~~~~~~~~
                                    改为a=ceil((double)d/s);
> 				if(mint>a) mint=a;
> 			}
> 			if(t==0||mint<2) cout<<0<<endl;
> 			else if(mint>t) cout<<t*x<<endl;
> 			else cout<<((mint-1)+(t-mint+1)/2)*x<<endl;
> 				//cout<<mint*x<<endl;
> 		}
> 	}
> 	return 0;
> }
> 
> 

• Re:有BUG! (20) ACM30413 2006-02-06 23:44:30
• Thank you very much!davydc ! (20) ACM30413 2006-02-06 23:45:16