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| #include <bits/stdc++.h>
#include <bits/extc++.h>
#define x first
#define y second
#define y1 Y1
#define y2 Y2
#define mp make_pair
#define pb push_back
#define DEBUG(x) cout << #x << " = " << x << endl;
using namespace std;
using namespace __gnu_pbds;
typedef long long LL;
typedef pair <int, int> pii;
template <typename T> inline int Chkmax (T &a, T b) { return a < b ? a = b, 1 : 0; }
template <typename T> inline int Chkmin (T &a, T b) { return a > b ? a = b, 1 : 0; }
template <typename T> inline T read ()
{
T sum = 0, fl = 1; char ch = getchar();
for (; !isdigit(ch); ch = getchar()) if (ch == '-') fl = -1;
for (; isdigit(ch); ch = getchar()) sum = (sum << 3) + (sum << 1) + ch - '0';
return sum * fl;
}
inline void proc_status ()
{
ifstream t ("/proc/self/status");
cerr << string (istreambuf_iterator <char> (t), istreambuf_iterator <char> ()) << endl;
}
const int MAXN = 5e5;
int N, M, Q, o;
int A[MAXN + 5];
namespace HASH
{
typedef unsigned long long ULL;
const ULL base = 20030123;
ULL Val[MAXN + 5], Hash[MAXN + 5], mul[MAXN + 5];
gp_hash_table <ULL, int> Map;
struct info
{
ULL val; int len;
info (ULL _val = 0, int _len = 0) { val = _val, len = _len; }
};
inline info merge (info x, info y)
{
info o;
o.len = x.len + y.len;
o.val = x.val * mul[y.len] + y.val;
return o;
}
int fg;
namespace SEG
{
#define mid ((l + r) >> 1)
#define ls o << 1
#define rs o << 1 | 1
#define lson ls, l, mid
#define rson rs, mid + 1, r
const int MAX_NODE = MAXN * 4;
info node[MAX_NODE + 5];
inline void push_up (int o) { node[o] = merge (node[ls], node[rs]); }
inline void build (int o, int l, int r)
{
if (l == r) return void (node[o] = info (Val[A[l]], 1));
build (lson), build (rson);
push_up (o);
}
inline void modify (int o, int l, int r, int x, ULL val)
{
if (l == r) return void (node[o] = info (val, 1));
if (x <= mid) modify (lson, x, val);
else modify (rson, x, val);
push_up (o);
}
inline void query (int o, int l, int r, int x, int y, info &res)
{
if (fg) return ;
if (x <= l && r <= y)
{
if (Map[merge (res, node[o]).val]) { res = merge (res, node[o]); return ; }
else if (l == r) { fg = 1; return ; }
}
if (x <= mid) query (lson, x, y, res);
if (y > mid) query (rson, x, y, res);
}
#undef mid
}
inline void init ()
{
for (int i = 1; i <= N; ++i) Val[i] = (ULL) rand() * rand() * rand() + (ULL) rand() * rand() + rand();
mul[0] = 1;
for (int i = 1; i <= N; ++i) mul[i] = mul[i - 1] * base;
}
}
using namespace HASH;
vector <int> G[MAXN + 5];
inline void dfs (int x, int f, ULL hash)
{
Hash[x] = hash;
Map[hash] = x;
sort (G[x].begin(), G[x].end());
for (int i = 0; i < G[x].size(); ++i)
{
int y = G[x][i]; if (y == f) continue;
dfs (y, x, hash * base + Val[i + 1]);
}
}
inline void Solve ()
{
HASH :: init ();
dfs (o, 0, 0); SEG :: build (1, 1, M);
while (Q--)
{
int op = read<int>(), x = read<int>();
if (op == 1)
{
int ql = read<int>(), qr = read<int>();
info now (Hash[x], 1);
fg = 0;
SEG :: query (1, 1, M, ql, qr, now);
printf("%d\n", Map[now.val]);
}
else
{
int y = read<int>();
SEG :: modify (1, 1, M, x, Val[y]);
}
}
}
inline void Input ()
{
N = read<int>(), M = read<int>(), Q = read<int>();
for (int i = 1; i <= N; ++i)
{
int f = read<int>();
if (!f) o = i;
else G[f].pb (i);
}
for (int i = 1; i <= M; ++i) A[i] = read<int>();
}
int main()
{
#ifndef ONLINE_JUDGE
freopen("D.in", "r", stdin);
freopen("D.out", "w", stdout);
#endif
Input ();
Solve ();
return 0;
}
|