> 
> #include <iostream.h>   
> #include <math.h> 
> void main(){ 
>     int a; 
>     __int64 temp,b,c; 
>      
>     cin >> a; 
>     temp=a*a+1; 
>     for(__int64 i=a; i>0; i--){ 
>         if(temp%i == 0) {b=i; 
>         c=temp/i; 
>         break;} 
>     } 
>     cout <<int(a*2+b+c) << endl; 
> } 

• 用a*a+1=(b-a)(c-a)就必须用int64 (0) xiaomi 2003-07-25 16:02:33
  • unsigned int也可以 (0) webster 2003-07-26 22:43:20