1 #include
     
       2 #include
      
        3 using namespace std; 4 const int maxn = 105; 5 struct Node 6 { 7     int father; 8     int level; 9     bool NoChild;10 };11 12 Node v[maxn];13 int level[maxn];14 15 int main()16 {17     int N,M,i,j,c,ID,child;18     int MAXLevel = 1;19     scanf("%d%d",&N,&M);20     for(i=0;i<100;i++)21     {22         v[i].father=0;23         v[i].level=0;24         v[i].NoChild=1;25     }26     for(i=0;i
       
         MAXLevel)46                     MAXLevel = v[j].level;47             }48         }49 50     for(i=1;i<=N;++i)51         if(v[i].NoChild==1)52             level[v[i].level]++;53     for(i=1;i