QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#689227 | #9532. 长野原龙势流星群 | yhddd | 0 | 82ms | 12420kb | C++14 | 1.5kb | 2024-10-30 15:56:12 | 2024-10-30 15:56:12 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
#define mod 998244353ll
#define pii pair<int,int>
#define fi first
#define se second
#define mems(x,y) memset(x,y,sizeof(x))
#define pb push_back
#define db double
using namespace std;
const int maxn=200010;
const int inf=1e18;
inline int read(){
int x=0,f=1;
char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=(x<<3)+(x<<1)+(ch-48);ch=getchar();}
return x*f;
}
bool Mbe;
int n,a[maxn];
int head[maxn],tot;
struct nd{
int nxt,to;
}e[maxn];
void add(int u,int v){e[++tot]={head[u],v};head[u]=tot;}
int num[maxn],val[maxn];
int st[maxn],tp;
void dfs(int u){
val[u]=a[u],num[u]=1;
for(int i=head[u];i;i=e[i].nxt){
int v=e[i].to;dfs(v);
}
tp=0;
for(int i=head[u];i;i=e[i].nxt){
int v=e[i].to;st[++tp]=v;
}
sort(st+1,st+tp+1,[&](int u,int v){return val[u]*num[v]>val[v]*num[u];});
for(int i=1;i<=tp;i++){
int v=st[i];
if((val[u]+val[v])*num[u]>val[u]*(num[u]+num[v])){
val[u]+=val[v],num[u]+=num[v];
}
else break;
}
}
void work(){
n=read();
for(int i=2;i<=n;i++)add(read(),i);
for(int i=1;i<=n;i++)a[i]=read();
dfs(1);
for(int i=1;i<=n;i++)printf("%.10lf\n",1.0*val[i]/num[i]);
}
// \
444
bool Med;
int T;
signed main(){
// freopen(".in","r",stdin);
// freopen(".out","w",stdout);
// ios::sync_with_stdio(0);
// cin.tie(0);cout.tie(0);
// cerr<<(&Mbe-&Med)/1048576.0<<" MB\n";
T=1;
while(T--)work();
}
Details
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Subtask #1:
score: 0
Wrong Answer
Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 10112kb
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 848557303.2272727489 912609654.6666666269 872318573.5000000000 816339179.0000000000 850251397.5555555820 858217450.2352941036 812960827.3636363745 866017059.7777777910 693335785.3750000000 921947345.6666666269 994728511.5000000000 950304719.0000000000 808673...
result:
wrong answer 1st numbers differ - expected: '883838885.9230770', found: '878341451.1578947', error = '0.0062200'
Subtask #2:
score: 0
Wrong Answer
Test #32:
score: 0
Wrong Answer
time: 82ms
memory: 12420kb
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:
686880396.2941176891 563544686.1428571939 693705743.1515151262 618391182.7999999523 746642876.0000000000 806376230.0000000000 698219365.7419354916 699584745.7500000000 617426841.1935484409 700325141.0000000000 691212027.0000000000 722381415.0000000000 631630674.3333333731 857291392.5000000000 709515...
result:
wrong answer 1st numbers differ - expected: '792545632.4154930', found: '686880396.2941177', error = '0.1333239'
Subtask #3:
score: 0
Skipped
Dependency #1:
0%
Subtask #4:
score: 0
Skipped
Dependency #2:
0%