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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#374516 | #7684. Sweet Sugar | arnold518 | WA | 181ms | 57512kb | C++17 | 2.5kb | 2024-04-02 14:52:00 | 2024-04-02 14:52:01 |
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], sz[MAXN+10], ans;
vector<int> V[MAXN+10];
bool dfs(int now, int bef)
{
int cnt=0;
V[now]={0};
for(auto nxt : adj[now])
{
if(nxt==bef) continue;
if(dfs(nxt, now)) continue;
cnt++;
if(cnt==1) swap(V[now], V[nxt]);
int t=dp[now]+dp[nxt];
if(dp[now]!=sz[now]) t=min(t, dp[now]);
if(dp[nxt]!=sz[nxt]) t=min(t, dp[nxt]);
dp[now]=t;
sum[now]+=sum[nxt];
sz[now]+=sz[nxt];
}
sum[now]+=A[now];
sz[now]+=(A[now]!=0);
if(cnt>1)
{
V[now].clear();
for(int i=0; i<=dp[now]; i++) V[now].push_back(i);
}
else
{
if(A[now]==1) V[now].push_back(V[now].back());
else if(A[now]==2) V[now].push_back(V[now].back()+1);
}
if(sum[now]>=K)
{
if(cnt>1)
{
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 || sum[now]==K) { ans++; return true; }
}
else
{
int t=V[now].size()-1+V[now].back()-K;
int lo=0, hi=V[now].size();
while(lo+1<hi)
{
int mid=lo+hi>>1;
if(V[now][mid]+mid<=t) lo=mid;
else hi=mid;
}
if(V[now][lo]+lo==t) { 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]=sz[i]=0;
adj[i].clear();
V[i].clear();
}
ans=0;
}
}
Details
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Test #1:
score: 100
Accepted
time: 4ms
memory: 52136kb
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: 3ms
memory: 57512kb
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: 181ms
memory: 54664kb
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 0 0 0 1 1 0 2 0 1 0 2 1 0 0 0 0 0 1 2 0 0 2 2 0 1 0 0 0 0 3 3 0 0 1 1 2 1 2 0 4 0 1 1 0 1 0 0 1 5 0 0 1 1 0 1 1 1 1 1 1 0 1 1 1 0 3 1 0 1 0 0 4 0 0 0 1 1 0 0 1 0 2 0 5 1 0 0 0 0 0 0 0 0 0 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 14th numbers differ - expected: '1', found: '0'