c射线是什么Week4 CSP C可怕的宇宙射线

#include<iostream>
#include<string.h>
using namespace std;
typedef struct node{
    int x,y;
}node;
int n,index=0;
int *a=new int[31];
bool dp[301][301]; 
bool p[301][301][8][31];     //(x,y,lens,direction,times)
//direction   0           1       2          3          4          5          6         7   
//           left-up   up     right-up   right    right-down  down left-down  left  
node sign(node start,int lens,int direction)            
             }    
            last.x=start.x-lens;last.y=start.y+lens; 
        }    
        else if(direction==1)        

             }
            last.x=start.x;last.y=start.y+lens;
        }
        else if(direction==2)

            }
             last.x=start.x +lens;last.y=start.y+lens; 
        } 
        else if(direction==3)

            } 
             last.x = start.x+lens;last.y = start.y;
        }
        else if(direction==4)

            }   
              last.x=start.x+lens;last.y = start.y -lens;
        }
        else if(direction==5)

            }
            last.x=start.x;last.y=start.y-lens;
        }
        else if(direction==6)

            }
              last.x=start.x-lens;last.y=start.y-lens;
        }
        else if(direction==7)

            }
        last.x=start.x-lens;last.y=start.y;    
        }    
    return last;    
} 
void dfs(node start,int direction,int times)

int main()
    return 0;
}