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QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #688512 | #9532. 长野原龙势流星群 | ANIG | 0 | 93ms | 14408kb | C++14 | 740b | 2024-10-30 10:22:59 | 2024-10-30 10:23:01 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int N=2e5+5;
int n,fa[N],w[N],g[N],mk[N];
vector<int>p[N];
double f[N];
bool cmp(int a,int b){
return f[a]>f[b];
}
void dfs(int x){
mk[x]=1;
f[x]=w[x];g[x]=1;
vector<int>jl;
for(auto c:p[x]){
if(mk[c])continue;
dfs(c);
jl.push_back(c);
}
sort(jl.begin(),jl.end(),cmp);
for(auto c:jl){
if(f[c]>f[x]){
f[x]=(f[x]*g[x]+f[c]*g[c])/(g[x]+g[c]);
g[x]+=g[c];
}
}
mk[x]=0;
}
signed main(){
cin>>n;
for(int i=2;i<=n;i++){
scanf("%lld",&fa[i]);
p[fa[i]].push_back(i);
p[i].push_back(fa[i]);
}
for(int i=1;i<=n;i++)scanf("%lld",&w[i]);
for(int i=1;i<=n;i++){
dfs(i);
printf("%.10lf\n",f[i]);
}
}
详细
Subtask #1:
score: 0
Wrong Answer
Test #1:
score: 0
Wrong Answer
time: 93ms
memory: 14408kb
input:
2000 1 2 2 4 5 2 3 6 4 2 7 2 8 14 8 12 1 14 4 14 8 18 9 2 7 22 20 22 14 29 28 16 6 21 23 6 21 14 13 9 1 4 18 13 2 39 21 33 18 20 38 27 27 1 49 5 51 3 31 24 10 42 2 44 13 9 35 66 27 60 67 59 29 40 53 2 33 43 26 43 62 16 78 45 14 10 73 69 41 35 25 26 2 70 54 1 54 48 5 36 44 28 90 29 51 51 93 82 95 45 ...
output:
878341451.1578947306 879173186.6363636255 859341816.8750000000 912609654.6666666269 889586179.7142857313 867612079.5000000000 866158381.5499999523 858762597.6969697475 844051480.7500000000 877905961.1818181276 823202176.3076922894 921947345.6666666269 994728511.5000000000 950304719.0000000000 888606...
result:
wrong answer 1st numbers differ - expected: '883838885.9230770', found: '878341451.1578947', error = '0.0062200'
Subtask #2:
score: 0
Time Limit Exceeded
Test #32:
score: 0
Time Limit Exceeded
input:
200000 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50 51 51 52 52...
output:
result:
Subtask #3:
score: 0
Skipped
Dependency #1:
0%
Subtask #4:
score: 0
Skipped
Dependency #2:
0%