每年万圣节,威斯康星的奶牛们都要打扮一番,出门在农场的N(1≤N≤100000)个牛棚里转悠,来采集糖果.她们 每走到一个未曾经过的牛棚,就会采集这个棚里的1颗糖果. 农场不大,所以约翰要想尽法子让奶牛们得到快乐. 他给每一个牛棚设置了一个“后继牛棚”.牛棚i的后继牛棚是Xi.他告诉奶牛们,她们到了一个牛棚之后,只要 再往后继牛棚走去,就可以搜集到很多糖果.事实上这是一种有点欺骗意味的手段,来节约他的糖果. 第i只奶 牛从牛棚i开始她的旅程.请你计算,每一只奶牛可以采集到多少糖果.
第1行输入N,之后一行一个整数表示牛棚i的后继牛棚Xi,共N行.
共N行,一行一个整数表示一只奶牛可以采集的糖果数量.
4 //有四个点 1 //1有一条边指向1 3 //2有一条边指向3 2 //3有一条边指向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 //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.