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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#603286 | #8720. BFS 序 0 | UESTC_DebugSimulator# | WA | 329ms | 29292kb | C++17 | 3.3kb | 2024-10-01 15:40:45 | 2024-10-01 15:40:46 |
Judging History
answer
#include<bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define lowbit(i) (i&-i)
#define rand() (myrand())
using namespace std;
mt19937 myrand(time(0));
const int maxn = 5e5 + 5;
int n, _, q, m, dfn[maxn], cnt, now[maxn], head[maxn], tot, dep[maxn], tr[maxn], fa[maxn];
struct EDGE{
int next, to;
}edge[maxn<<1];
void addedge(int from, int to) {
edge[++cnt].next = head[from];
edge[cnt].to = to;
head[from] = cnt;
}
void change(int x, int y) {
while(x <= m) {
tr[x] += y;
x += lowbit(x);
}
}
int get(int x) {
int res = 0;
while(x) {
res += tr[x];
x -= lowbit(x);
}
return res;
}
namespace Segtr{
int vmax[maxn<<2], vmin[maxn<<2];
int searchmin(int x, int l, int r, int ql, int qr) {
if (ql <= l && qr >= r) return vmin[x];
int mid = (l + r)>>1;
if (ql <= mid && qr > mid) return min(searchmin(x<<1, l, mid, ql, qr), searchmin(x<<1|1, mid + 1, r, ql, qr));
if (ql > mid) return searchmin(x<<1|1, mid + 1, r, ql, qr);
return searchmin(x<<1, l, mid, ql, qr);
}
int searchmax(int x, int l, int r, int ql, int qr) {
if (ql <= l && qr >= r) return vmax[x];
int mid = (l + r)>>1;
if (ql <= mid && qr > mid) return max(searchmax(x<<1, l, mid, ql, qr), searchmax(x<<1|1, mid + 1, r, ql, qr));
if (ql > mid) return searchmax(x<<1|1, mid + 1, r, ql, qr);
return searchmax(x<<1, l, mid, ql, qr);
}
void modify(int x, int l, int r, int ql, int t) {
if (l == r) {
if (t == 0) {
vmin[x] = 1e9;
vmax[x] = 0;
return;
}
vmin[x] = vmax[x] = t;
return;
}
int mid = (l + r)>>1;
if (ql <= mid) modify(x<<1, l, mid, ql, t);
else modify(x<<1|1, mid + 1, r, ql, t);
vmin[x] = min(vmin[x<<1], vmin[x<<1|1]);
vmax[x] = max(vmax[x<<1], vmax[x<<1|1]);
}
}
void dfs(int u, int p) {
dfn[u] = ++tot;
dep[u] = dep[p] + 1;
fa[u] = p;
for (int i = head[u] ; i ; i = edge[i].next) {
int v = edge[i].to;
if (v == p) continue;
dfs(v, u);
}
now[u] = tot;
}
void solve() {
cin >> n;
for (int i = 1 ; i <= (maxn<<2) - 5 ; ++i) Segtr::vmin[i] = 1e9;
for (int i = 2 ; i <= n ; ++i) {
int p;
cin >> p;
addedge(i, p);
addedge(p, i);
}
dfs(1, 0);
cin >> q;
for (int i = 1 ; i <= q ; ++i) {
cin >> m;
vector<int>pt(m + 1);
int jud = 0;
for (int j = 1 ; j <= m ; ++j) {
cin >> pt[j];
if (j > 1 && dep[pt[j]] < dep[pt[j - 1]]) jud = 1;
}
if (jud == 1) {
cout << "No" << '\n';
continue;
}
int p = m;
while(p >= 1) {
int l = p, r = p;
while(l - 1 >= 1 && dep[pt[l]] == dep[pt[l - 1]]) l--;
for (int j = l ; j <= r ; ++j) {
int vmax = Segtr::searchmax(1, 1, n, dfn[pt[j]], now[pt[j]]);
int vmin = Segtr::searchmin(1, 1, n, dfn[pt[j]], now[pt[j]]);
if (vmin <= n && get(vmin) != j - l) jud = 1;
if (vmax) change(vmax, 1);
}
for (int j = l ; j <= r ; ++j) {
int vmax = Segtr::searchmax(1, 1, n, dfn[pt[j]], now[pt[j]]);
if (vmax) change(vmax, -1);
}
for (int j = l ; j <= r ; ++j) {
Segtr::modify(1, 1, n, dfn[pt[j]], j);
}
p = l - 1;
}
for (int j = 1 ; j <= m ; ++j) Segtr::modify(1, 1, n, dfn[pt[j]], 0);
for (int j = 1 ; j <= m ; ++j) Segtr::modify(1, 1, n, dfn[pt[j]], 0);
cout << (jud == 1 ? "No" : "Yes") << '\n';
}
}
signed main(void) {
ios::sync_with_stdio(false);
cin.tie(0);
solve();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 18284kb
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: -100
Wrong Answer
time: 329ms
memory: 29292kb
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 No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes Y...
result:
wrong answer expected NO, found YES [1st token]