QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#417858 | #8720. BFS 序 0 | wsyear | AC ✓ | 268ms | 70900kb | C++17 | 1.8kb | 2024-05-22 23:48:14 | 2024-05-22 23:48:14 |
Judging History
answer
#include <bits/stdc++.h>
#define rep(i, j, k) for (int i = (j); i <= (k); ++i)
#define per(i, j, k) for (int i = (j); i >= (k); --i)
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second
using ll = long long;
using pii = std::pair<int, int>;
using pll = std::pair<ll, ll>;
template<class T>inline void chkmn(T &x, T y) { if (y < x) x = y; }
template<class T>inline void chkmx(T &x, T y) { if (y > x) x = y; }
using namespace std;
const int maxn = 500010;
int n, m, k, a[maxn], b[maxn], fa[maxn], st[maxn][20], dep[maxn], deg[maxn];
vector<int> e[maxn], g[maxn];
bool check() {
rep (i, 1, k) b[i] = a[i];
sort(b + 1, b + k + 1);
rep (i, 1, k - 1) if (b[i] == b[i + 1]) return 0;
rep (i, 1, k - 1) if (dep[a[i]] > dep[a[i + 1]]) return 0;
set<int> S;
rep (i, 1, k - 1) if (dep[a[i]] == dep[a[i + 1]]) {
int u = a[i], v = a[i + 1];
per (i, 19, 0) if (st[u][i] != st[v][i]) u = st[u][i], v = st[v][i];
if (!S.count(u)) S.emplace(u), deg[u] = 0, e[u].clear();
if (!S.count(v)) S.emplace(v), deg[v] = 0, e[v].clear();
deg[v]++, e[u].emplace_back(v);
}
queue<int> q;
for (int x : S) if (!deg[x]) q.emplace(x);
int cnt = 0;
while (!q.empty()) {
int u = q.front();
q.pop(), cnt++;
for (int v : e[u]) if (!(--deg[v])) q.emplace(v);
}
return cnt == SZ(S);
}
int main() {
cin.tie(nullptr) -> ios::sync_with_stdio(false);
cin >> n;
rep (i, 2, n) cin >> fa[i], e[fa[i]].emplace_back(i);
rep (i, 1, n) dep[i] = dep[fa[i]] + 1, st[i][0] = fa[i];
rep (j, 1, 19) rep (i, 1, n) st[i][j] = st[st[i][j - 1]][j - 1];
cin >> m;
while (m--) {
cin >> k;
rep (i, 1, k) cin >> a[i];
if (check()) cout << "Yes\n";
else cout << "No\n";
}
}
这程序好像有点Bug,我给组数据试试?
Details
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Test #1:
score: 100
Accepted
time: 3ms
memory: 35792kb
input:
6 1 1 3 2 4 10 4 3 6 2 5 1 4 3 2 4 5 5 2 5 4 6 3 3 1 4 2 3 5 6 3 5 4 5 2 6 1 4 4 3 2 5 4 4 6 2 3 3 3 2 6
output:
No Yes Yes No No No No No No Yes
result:
ok 10 token(s): yes count is 3, no count is 7
Test #2:
score: 0
Accepted
time: 258ms
memory: 68532kb
input:
300000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...
output:
No Yes Yes Yes No No No No No No Yes Yes No Yes No Yes Yes Yes No No No No Yes No No Yes No No No No Yes Yes Yes No No Yes No No No No No No No Yes No Yes No Yes No No No No Yes Yes Yes No No Yes No No No No No Yes Yes No No No No No Yes Yes No Yes No No No Yes No No Yes No No Yes Yes Yes No No No Y...
result:
ok 254 token(s): yes count is 89, no count is 165
Test #3:
score: 0
Accepted
time: 268ms
memory: 70900kb
input:
300000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...
output:
Yes No No Yes No No Yes Yes No Yes No Yes No No No Yes No No No No Yes No No No No No Yes Yes No No No Yes No No No No No Yes Yes Yes No No No No No No No Yes No Yes No No No Yes No No No Yes No No Yes No Yes Yes No No No Yes No Yes Yes Yes No Yes No Yes Yes Yes Yes Yes No Yes No No No No No Yes No ...
result:
ok 266 token(s): yes count is 102, no count is 164
Test #4:
score: 0
Accepted
time: 250ms
memory: 69932kb
input:
300000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1...
output:
No No Yes No Yes No No No No No No No No Yes No No No No No No No No Yes No No No No Yes No No No No No No No Yes Yes No No No No No No Yes No No No Yes Yes No No No Yes Yes No Yes No Yes No Yes No Yes No Yes No No Yes No No No No No No No Yes Yes No Yes No No No No No No Yes Yes No Yes Yes No No No...
result:
ok 252 token(s): yes count is 87, no count is 165
Test #5:
score: 0
Accepted
time: 4ms
memory: 36116kb
input:
10 1 1 3 3 1 3 1 3 9 10000 4 3 5 6 9 5 3 1 4 9 6 5 6 4 3 5 7 28 8 3 4 3 1 6 3 5 8 7 2 4 4 4 2 7 5 9 2 4 10 8 4 10 3 4 5 7 3 5 2 9 6 4 7 2 3 9 5 5 9 2 5 6 1 12 3 5 8 8 1 3 5 8 4 5 9 1 29 3 9 9 1 5 8 5 5 6 10 8 8 4 8 4 2 8 10 5 7 3 7 1 8 4 7 5 1 6 7 5 9 8 3 2 1 6 4 4 1 9 5 22 10 9 5 4 5 8 10 3 2 1 10 ...
output:
No No No No No No No No No No No No No No No No No No No No No No No No No No No Yes No No No No Yes No No No No No Yes No No No No No No No Yes No No No No Yes No No No Yes No No Yes No No No No No No No No No No No No No No No Yes No Yes No No No No No No No No No Yes Yes No Yes No No No No No No ...
result:
ok 10000 token(s): yes count is 1058, no count is 8942
Test #6:
score: 0
Accepted
time: 4ms
memory: 36724kb
input:
9 1 2 1 2 2 4 2 6 10000 6 5 1 4 3 7 8 14 6 8 7 9 7 5 1 8 3 6 3 8 5 2 2 6 9 17 7 8 6 5 2 1 5 5 9 3 4 1 5 2 7 2 5 3 8 6 5 5 3 9 1 6 8 8 3 5 8 7 9 4 6 2 4 8 9 6 5 7 4 7 2 9 3 8 1 6 1 4 9 5 6 2 4 7 5 4 3 5 9 5 2 1 3 4 4 5 7 3 3 9 1 8 4 4 2 8 6 26 7 4 7 6 1 7 9 4 5 5 8 9 8 2 4 8 9 6 2 8 6 4 5 5 4 4 45 3 ...
output:
No No Yes No Yes No No No No No No No No No Yes No No No No No No Yes No No No No No No Yes No No No No No No No No Yes Yes No No No Yes No No No No No No No No No No No No Yes No No No No No No No No No No No No No Yes No Yes No No No No No No No No Yes No No No Yes No No Yes No No No No No No No N...
result:
ok 10000 token(s): yes count is 1492, no count is 8508
Test #7:
score: 0
Accepted
time: 8ms
memory: 34960kb
input:
8 1 1 2 4 2 4 6 10000 5 2 6 6 2 1 3 7 3 8 2 8 1 5 7 5 1 2 7 3 2 3 5 3 8 4 3 5 8 2 4 5 3 4 3 2 1 8 6 6 8 4 5 3 1 6 3 1 2 7 4 6 4 8 6 4 3 5 4 7 6 8 5 11 2 1 6 5 2 7 1 3 3 5 4 4 6 1 7 2 7 6 2 7 8 4 1 3 3 4 6 7 3 7 1 6 38 3 4 6 6 3 4 8 1 5 3 1 8 8 6 2 3 6 7 8 8 4 2 3 7 3 3 6 7 7 5 7 5 8 8 5 4 5 7 1 8 5 ...
output:
No No No No Yes No No No No No No No No No No Yes No No Yes No No No No No Yes No Yes No No No Yes Yes No No No No No No Yes No No No No No No No No No No No Yes No No No No No No No No No Yes No No No No No No No No No No No No No No Yes No No No No No No No No No No No No No No Yes No No No No No ...
result:
ok 10000 token(s): yes count is 1568, no count is 8432
Test #8:
score: 0
Accepted
time: 3ms
memory: 36884kb
input:
7 1 2 3 1 2 5 10000 5 1 7 3 5 6 5 5 3 2 7 4 4 5 2 6 4 12 3 1 5 5 6 6 3 5 3 5 3 3 11 2 3 2 6 7 3 6 6 3 3 3 2 3 2 6 1 3 4 2 6 7 3 2 7 1 6 5 2 7 3 4 1 27 2 5 6 1 7 1 7 1 4 6 7 1 6 2 1 7 1 3 4 4 7 7 2 6 4 4 3 2 5 6 1 7 3 3 1 4 4 1 7 3 4 3 4 2 1 4 4 1 6 7 4 6 2 7 4 4 5 1 6 4 1 3 5 1 2 3 5 7 5 2 3 7 6 5 1...
output:
No No Yes No No No No No No No Yes Yes No Yes No No No No Yes No No No No Yes No No Yes No No No No No No No No No No No No No No No No No No No No No No No Yes No No Yes No Yes Yes No Yes Yes No No No No No No No No No No Yes No No No No No No No No Yes No Yes No No No No Yes Yes Yes Yes Yes Yes Ye...
result:
ok 10000 token(s): yes count is 2205, no count is 7795
Extra Test:
score: 0
Extra Test Passed