QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#684901 | #6438. Crystalfly | catch-up-from-behind# | WA | 1ms | 7980kb | C++17 | 1.9kb | 2024-10-28 16:27:39 | 2024-10-28 16:27:39 |
Judging History
answer
#include <bits/stdc++.h>
#define F(i,x,y) for(int i=(x);i<=(y);i++)
#define DF(i,x,y) for(int i=(x);i>=(y);i--)
#define ms(x,y) memset(x,y,sizeof(x))
#define SZ(x) (int)x.size()-1
#define all(x) x.begin(),x.end()
#define pb push_back
using namespace std;
typedef long long LL;
typedef unsigned long long ull;
typedef pair<int,int> pii;
template<typename T> void chkmax(T &x,T y){ x=max(x,y);}
template<typename T> void chkmin(T &x,T y){ x=min(x,y);}
template<typename T> void read(T &FF){
FF=0;int RR=1;char ch=getchar();
for(;!isdigit(ch);ch=getchar()) if(ch=='-') RR=-1;
for(;isdigit(ch);ch=getchar()) FF=(FF<<1)+(FF<<3)+ch-48;
FF*=RR;
}
const int N=100010;
const LL inf=1e18;
int n,a[N],t[N];
vector<int> G[N];
LL f[N],g[N];
void dfs(int u,int fa){
LL tot=0;
for(int v:G[u]) if(v!=fa) dfs(v,u),tot+=f[v];
f[u]=0;
for(int v:G[u]) if(v!=fa) chkmax(f[u],a[v]+tot);
LL mx=-inf;
for(int v:G[u]) if(v!=fa){
if(t[v]==3) chkmax(f[u],tot-f[v]+g[v]+a[v]+mx);
chkmax(mx,a[v]-g[v]+f[v]);
}
mx=-inf;
DF(i,SZ(G[u]),0){
int v=G[u][i];if(v==fa) continue;
if(t[v]==3) chkmax(f[u],tot+a[v]+mx);
chkmax(mx,a[v]-g[v]+f[v]);
}
// for(int v1:G[u]) if(v1!=fa)
// for(int v2:G[u]) if(v2!=fa&&v2!=u&&t[v2]==3){
// LL res=f[v2]+a[v2]+g[v1]+a[v1];
// for(int oth:G[u]) if(oth!=fa&&oth!=v1&&oth!=v2) res+=f[oth];
// chkmax(f[u],res);
// }
g[u]=tot;
// for(int v:G[u]) if(v!=fa) g[u]+=f[v];
}
void work(){
read(n);
F(i,1,n) read(a[i]);
F(i,1,n) read(t[i]);
F(i,1,n) G[i].clear();
F(i,1,n-1){
int x,y;read(x),read(y);
G[x].pb(y),G[y].pb(x);
}
dfs(1,0);
printf("%lld\n",f[1]+a[1]);
}
int main(){
int T;read(T);
while(T--) work();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 7856kb
input:
2 5 1 10 100 1000 10000 1 2 1 1 1 1 2 1 3 2 4 2 5 5 1 10 100 1000 10000 1 3 1 1 1 1 2 1 3 2 4 2 5
output:
10101 10111
result:
ok 2 number(s): "10101 10111"
Test #2:
score: -100
Wrong Answer
time: 1ms
memory: 7980kb
input:
10 6 8 1 1 5 8 9 2 1 2 2 2 2 1 2 2 3 2 4 1 5 2 6 6 6 4 4 1 3 6 2 1 3 3 3 3 1 2 1 3 3 4 4 5 5 6 6 10 5 1 8 5 1 1 3 1 2 2 2 1 2 2 3 2 4 2 5 3 6 10 6 8 8 9 6 9 5 6 6 4 2 1 3 3 2 2 2 2 3 1 1 2 1 3 3 4 4 5 5 6 4 7 2 8 7 9 9 10 7 10 9 1 5 7 5 4 1 1 1 2 1 3 2 1 2 1 3 3 4 3 5 5 6 1 7 5 7 1 1 4 2 3 1 3 2 2 1...
output:
25 23 24 59 31 14 16 28 19 18
result:
wrong answer 2nd numbers differ - expected: '24', found: '23'