一道简单的搜索题目,建一个树,根节点是 0 ,连接的两个节点的距离是 1 ,求 到 根节点长度是2的节点的个数. #include<stdio.h> #include<string.h> struct node{ int next,to; int step; }; node edge[]; int tot; ]; int N,D,ans; void Add(int x,int y) { edge[tot].to=y; edge[tot].next=head[x]; head[x]=…

http://acm.hdu.edu.cn/showproblem.php?pid=4707 Pet Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description One day, Lin Ji wake up in the morning and found that his pethamster escaped. He searched in th…

Pet                                                          Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)                                                                          Total Submission(s): 1909    Acc…

Pet Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2248    Accepted Submission(s): 1098 Problem Description One day, Lin Ji wake up in the morning and found that his pethamster escaped. He sea…

Pet Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 535 Accepted Submission(s): 258 Problem Description One day, Lin Ji wake up in the morning and found that his pethamster escaped. He searched in…

Pet Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 181    Accepted Submission(s): 55 Problem Description One day, Lin Ji wake up in the morning and found that his pethamster escaped. He searche…

Pet Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1809    Accepted Submission(s): 874 Problem Description One day, Lin Ji wake up in the morning and found that his pethamster escaped. He sear…

http://acm.hdu.edu.cn/showproblem.php?pid=4710 Balls Rearrangement Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 735    Accepted Submission(s): 305 Problem Description Bob has N balls and A b…

http://acm.hdu.edu.cn/showproblem.php?pid=4708 Rotation Lock Puzzle Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description Alice was felling into a cave. She found a strange door with a number square m…

http://acm.hdu.edu.cn/showproblem.php?pid=4715 Difference Between Primes Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description All you know Goldbach conjecture.That is to say, Every even integer great…