8 人解决，20 人已尝试。
12 份提交通过，共有 84 份提交。
7.7 EMB 奖励。
单点时限: 3.0 sec
内存限制: 256 MB
Every year in Wisconsin the cows celebrate the USA autumn holiday of Halloween by dressing up in costumes and collecting candy that Farmer John leaves in the N (1 <= N <= 100,000) stalls conveniently numbered 1..N.
Because the barn is not so large, FJ makes sure the cows extend their fun by specifying a traversal route the cows must follow. To implement this scheme for traveling back and forth through the barn, FJ has posted a “next stall number” next_i (1 <= next_i <= N) on
stall i that tells the cows which stall to visit next; the cows thus might travel the length of the barn many times in order to collect their candy.
FJ mandates that cow i should start collecting candy at stall i. A cow stops her candy collection if she arrives back at any stall she has already visited.
Calculate the number of unique stalls each cow visits before being forced to stop her candy collection.
Line 1: A single integer: N
Lines 2..N+1: Line i+1 contains a single integer: next_i
number of unique stalls visited by cow i before she returns to
a stall she has previously visited.
4 1 3 2 3 INPUT DETAILS: Four stalls. * Stall 1 directs the cow back to stall 1. * Stall 2 directs the cow to stall 3 * Stall 3 directs the cow to stall 2 * Stall 4 directs the cow to stall 3
1 2 2 3 OUTPUT DETAILS: Cow 1: Start at 1, next is 1. Total stalls visited: 1. Cow 2: Start at 2, next is 3, next is 2. Total stalls visited: 2. Cow 3: Start at 3, next is 2, next is 3. Total stalls visited: 2. Cow 4: Start at 4, next is 3, next is 2, next is 3. Total stalls visited: 3.
8 人解决，20 人已尝试。
12 份提交通过，共有 84 份提交。
7.7 EMB 奖励。