1090 Highest Price in Supply Chain (25 分)【难度: 一般 / 知识点: 树的遍历】
https://pintia.cn/problem-sets/994805342720868352/problems/994805376476626944
就是找深度最深的叶节点的深度，和最深的结点个数。
#include<bits/stdc++.h>
using namespace std;
const int N=1e5+10;
vector<int>ve[N];
int n,deep,cnt;
double p,r;
void dfs(int u,int fa,int step)
{if(ve[u].size()==0) {if(deep==step) cnt++;else if(deep<step) deep=step,cnt=1;return;}for(int i=0;i<ve[u].size();i++){if(ve[u][i]==fa) continue;dfs(ve[u][i],u,step+1);}
}
int main(void)
{cin>>n>>p>>r;r/=100;for(int i=1;i<=n;i++){int x; cin>>x;x++;//让其从下标[0-n]ve[x].push_back(i);}dfs(0,-1,0);printf("%.2lf ",p*pow(1+r,deep-1));cout<<cnt<<endl;return 0;
}
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