QOJ.ac

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
#114460#4589. White-Black Treeberarchegas#WA 2ms6392kbC++171.2kb2023-06-22 04:55:352023-06-22 04:55:37

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-06-22 04:55:37]
  • 评测
  • 测评结果:WA
  • 用时:2ms
  • 内存:6392kb
  • [2023-06-22 04:55:35]
  • 提交

answer

#include <bits/stdc++.h>
 
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
 
mt19937 rng((int) chrono::steady_clock::now().time_since_epoch().count());
    
const int MOD = 1e9 + 7;
const int MAXN = 1e5 + 5;
const ll INF = 2e18;

vector<int> v[MAXN];
int cor[MAXN], dep[MAXN], qtd[MAXN];

int calcDep(int node) {
    for (int x : v[node]) {
        dep[node] = max(dep[node], calcDep(x) + 1);
    }
    return dep[node];
}

int calcQtd(int node) {
    qtd[node] = cor[node];
    for (int x : v[node]) {
        qtd[node] += calcQtd(x);
    }
    return qtd[node];
}

int dfs(int node) {
    if (cor[node]) {
        // branco
        return dep[node] + qtd[node];
    }
    else {
        // preto
        int ans = 0;
        for (int x : v[node]) {
            ans ^= dfs(x);
        }
        return ans;
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    for (int i = 2; i <= n; i++) {
        int p;
        cin >> p;
        v[p].push_back(i);
    }
    for (int i = 1; i <= n; i++) {
        cin >> cor[i];
    }
    calcDep(1);
    cout << (dfs(1) ? "First\n" : "Second\n");
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 2ms
memory: 6028kb

input:

7
1 1 1 3 3 3
0 1 1 0 0 0 1

output:

First

result:

ok single line: 'First'

Test #2:

score: 0
Accepted
time: 2ms
memory: 5780kb

input:

5
1 1 2 3
0 1 1 0 0

output:

Second

result:

ok single line: 'Second'

Test #3:

score: 0
Accepted
time: 1ms
memory: 5808kb

input:

4
1 1 1
1 1 0 1

output:

First

result:

ok single line: 'First'

Test #4:

score: 0
Accepted
time: 2ms
memory: 5952kb

input:

2
1
0 0

output:

Second

result:

ok single line: 'Second'

Test #5:

score: 0
Accepted
time: 2ms
memory: 6316kb

input:

3
1 2
0 1 1

output:

First

result:

ok single line: 'First'

Test #6:

score: 0
Accepted
time: 1ms
memory: 5972kb

input:

3
1 2
1 1 1

output:

First

result:

ok single line: 'First'

Test #7:

score: 0
Accepted
time: 0ms
memory: 6392kb

input:

3
1 1
1 1 1

output:

First

result:

ok single line: 'First'

Test #8:

score: -100
Wrong Answer
time: 2ms
memory: 5876kb

input:

3
1 1
0 1 0

output:

Second

result:

wrong answer 1st lines differ - expected: 'First', found: 'Second'