快速幂和组合数
    
    
    
    
    
        
        
        
        
            
                
                    | 问题 | AC | PE | WA | TLE | MLE | OLE | RE | CE | TR | Total | 
              
            
            
                | 4019 A | 3 | 0 | 5 | 1 | 0 | 0 | 0 | 0 | TR | 41 | 
| 3980 B | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | TR | 0 | 
| 1131 C | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | TR | 3959 | 
| 4656 D | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | TR | 5 | 
| 4652 E | 4 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | TR | 5 | 
| 4653 F | 5 | 0 | 0 | 4 | 0 | 0 | 0 | 1 | TR | 11 | 
| 4654 G | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | TR | 6 | 
| 4655 H | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | TR | 1 |