[等价转换]UVa11054 - Wine trading in Gergovia

      
      

       
       #include<bits/stdc++.h>
       
       

       
       using 
       
       namespace 
       
       std;
       
       

       
       int 
       
       main()
       
       
{
       
       
    
       
       int 
       
       n;
       
       
    
       
       while(
       
       cin
       
       >>
       
       n
       
       &&
       
       n)
       
       
    {
       
       
        
       
       long 
       
       long 
       
       ans
       
       =
       
       0,
       
       a,
       
       last
       
       =
       
       0;
       
       
        
       
       for(
       
       int 
       
       i
       
       =
       
       0; 
       
       i
       
       <
       
       n; 
       
       i
       
       ++)
       
       
        {
       
       
            
       
       cin
       
       >>
       
       a;
       
       
            
       
       ans
       
       +=
       
       abs(
       
       last);
       
       
            
       
       last
       
       +=
       
       a;
       
       
        }
       
       
        
       
       cout
       
       <<
       
       ans
       
       <<
       
       endl;
       
       
    }
       
       
    
       
       return 
       
       0;
       
       
}
      
      
      
      

       
       
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