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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#374216 | #7684. Sweet Sugar | arnold518 | WA | 148ms | 32572kb | C++17 | 1.6kb | 2024-04-02 12:56:43 | 2024-04-02 12:56:53 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int MAXN = 1e6;
int TC, N, K;
int A[MAXN+10];
vector<int> adj[MAXN+10];
int dp[MAXN+10], sum[MAXN+10], ans;
bool dfs(int now, int bef)
{
bool flag=false;
sum[now]=A[now];
for(auto nxt : adj[now])
{
if(nxt==bef) continue;
if(dfs(nxt, now)) continue;
sum[now]+=sum[nxt];
if(!flag)
{
flag=true;
dp[now]=dp[nxt];
}
else dp[now]=min(dp[now], dp[nxt]);
}
if(sum[now]>=K)
{
bool flag=true;
if(A[now]==0)
{
if(K%2 && K/2<dp[now]) flag=false;
}
else if(A[now]==2)
{
if(K%2 && K/2<dp[now]+1) flag=false;
}
else if(A[now]==1)
{
if(K%2==0 && K/2<=dp[now]) flag=false;
}
if(flag) { ans++; return true; }
}
if(A[now]==2) dp[now]++;
else if(A[now]==1) dp[now]=0;
return false;
}
int main()
{
scanf("%d", &TC);
while(TC--)
{
scanf("%d%d", &N, &K);
for(int i=1; i<=N; i++) scanf("%d", &A[i]);
for(int i=1; i<N; i++)
{
int u, v;
scanf("%d%d", &u, &v);
adj[u].push_back(v);
adj[v].push_back(u);
}
dfs(1, 1);
printf("%d\n", ans);
for(int i=1; i<=N; i++)
{
dp[i]=sum[i]=0;
adj[i].clear();
}
ans=0;
}
}
Details
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Test #1:
score: 100
Accepted
time: 3ms
memory: 30528kb
input:
4 7 5 1 2 1 2 2 1 2 1 2 2 3 3 4 3 5 5 6 5 7 2 2 1 0 1 2 1 1 1 1 2 1
output:
2 0 1 0
result:
ok 4 number(s): "2 0 1 0"
Test #2:
score: 0
Accepted
time: 7ms
memory: 32572kb
input:
12 1 1 0 1 1 1 1 1 2 1 2 0 1 2 1 1 2 2 1 3 0 1 3 1 1 3 2 1 2000000 0 1 2000000 1 1 2000000 2
output:
0 1 0 0 0 1 0 0 0 0 0 0
result:
ok 12 numbers
Test #3:
score: -100
Wrong Answer
time: 148ms
memory: 32564kb
input:
200000 5 2 1 1 0 0 1 2 4 5 2 4 1 3 2 5 1 0 0 0 0 0 5 1 1 2 3 2 5 4 5 3 1 0 0 0 1 1 4 4 2 3 4 5 2 5 9 1 0 0 0 2 4 3 2 1 3 1 5 1 5 3 0 1 1 0 1 5 4 2 1 4 3 5 1 5 1 0 2 1 1 1 5 3 2 4 3 4 1 4 5 1 1 0 1 1 0 1 5 4 2 1 3 5 2 5 7 0 2 1 1 2 5 1 2 3 2 5 5 4 5 5 0 1 0 1 0 2 4 4 3 5 2 1 5 5 1 0 0 1 0 1 4 1 4 5 2...
output:
1 0 0 0 1 3 3 0 0 2 0 0 2 1 0 0 1 1 0 2 0 1 0 3 1 0 0 0 0 0 1 2 0 0 2 2 1 1 0 0 0 0 3 3 0 0 1 1 2 1 2 1 4 0 1 1 0 1 0 0 1 5 0 1 1 1 0 1 1 1 1 1 2 0 1 1 1 0 3 1 0 1 0 0 4 1 0 0 1 1 1 1 1 1 2 0 5 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 1 0 0 0 0 0 1 0 0 1 1 0 1 0 1 1 1 2 0 1 2 0 0 2 0 0 1 0 0 0 0 0 ...
result:
wrong answer 24th numbers differ - expected: '2', found: '3'