| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 794540 | normankr07 | Cats or Dogs (JOI18_catdog) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/*
Templete by norman/KNN-07
Who tf even love CP :sob:
*/
#ifndef LOCAL
#pragma GCC optimize("Ofast,unroll-loops,inline")
// Bitwise pragma fuck
// #pragma GCC target("avx,avx2,bmi")
// Judges with GCC >= 12 only needs Ofast
// #pragma GCC optimize("O3,no-stack-protector,fast-math,unroll-loops,tree-vectorize")
// MLE optimization
// #pragma GCC optimize("conserve-stack")
// Old judges
// #pragma GCC target("sse4.2,popcnt,lzcnt,abm,mmx,fma,bmi,bmi2")
// New judges. Test with assert(__builtin_cpu_supports("avx2"));
// #pragma GCC target("arch=skylake")
// Atcoder
// #pragma GCC target("avx2,popcnt,lzcnt,abm,bmi,bmi2,fma")
#endif
#ifndef LOCAL
#include "catdog.h"
#endif
#include <bits/stdc++.h>
using namespace std;
// Wish you can debug? YesYes
#ifndef LOCAL
#define cerr \
if (0) \
cerr
#endif
// Policy based DS?
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
// Who tf deal with overflow
// #define int long long
/*
pbds blog :
https://codeforces.com/blog/entry/11080
https://codeforces.com/blog/entry/13279
*/
// Useful pbds
// template <typename T>
// using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
// template <typename T>
// using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
// typedef trie<string, null_type, trie_string_access_traits<>, pat_trie_tag, trie_prefix_search_node_update> pref_trie;
#define el '\n'
#define mpp make_pair
#define pb push_back
#define ppb pop_back
#define pf push_front
#define emp emplace_back
#define fi first
#define nd second
#define forinc(i, a, b) for (int i = (a); i <= (b); i++)
#define fordec(i, a, b) for (int i = (a); i >= (b); i--)
#define alle(x) (x).begin(), (x).end()
#define ralle(x) (x).rbegin(), (x).rend()
#define mms(a, v) memset(a, v, sizeof(a))
#define lwb(a, v) lower_bound((a).begin(), (a).end(), v)
#define upb(a, v) upper_bound((a).begin(), (a).end(), v)
#define bit(i, a) (((a) >> (i)) & 1)
#define BIT_SET(a, b) ((a) |= (1ULL << (b)))
#define BIT_CLEAR(a, b) ((a) &= ~(1ULL << (b)))
#define BIT_FLIP(a, b) ((a) ^= (1ULL << (b)))
#define BIT_CHECK(a, b) (!!((a) & (1ULL << (b))))
#define BITMASK_SET(x, mask) ((x) |= (mask))
#define BITMASK_CLEAR(x, mask) ((x) &= (~(mask)))
#define BITMASK_FLIP(x, mask) ((x) ^= (mask))
#define BITMASK_CHECK_ALL(x, mask) (!(~(x) & (mask)))
#define BITMASK_CHECK_ANY(x, mask) ((x) & (mask))
#define POPCNT(mask) __builtin_popcount(mask)
#define POPCNTLL(mask) __builtin_popcountll(mask)
#define CTZ(mask) __builtin_ctz(mask)
#define CTZLL(mask) __builtin_ctzll(mask)
typedef long long ll;
typedef unsigned long long ull;
typedef long double ldb;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef map<int, int> mii;
typedef map<ll, ll> mll;
typedef vector<bool> vb;
template <typename T, typename U>
inline void maximize(T &x, U y)
{
if (y < x)
x = y;
}
template <typename T, typename U>
inline void minimize(T &x, U y)
{
if (x < y)
x = y;
}
inline int add_m(int a, int b, int mod)
{
int res = a + b;
return (res >= mod ? res - mod : res);
}
inline int mod_neg(int a, int b, int mod)
{
int res;
if (abs(a - b) < mod)
res = a - b;
else
res = (a - b) % mod;
return (res < 0 ? res + mod : res);
}
inline int mul_wmod(int a, int b, int c)
{
ll res = (ll)a * b;
return (res >= c ? res % c : res);
}
inline int mul_wnmod(int a, int b, int c)
{
ll res = (ll)a * b;
return ((res % c) + c) % c;
}
// Debugger Utils
template <typename A, typename B>
ostream &operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template <size_t i, class T>
ostream &print_tuple_utils(ostream &out, const T &tup)
{
if constexpr (i == tuple_size<T>::value)
return out << ")";
else
return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup);
}
template <class... U>
ostream &operator<<(ostream &out, const tuple<U...> &t)
{
return print_tuple_utils<0, tuple<U...>>(out, t);
}
#define db(val) "[" #val " = " << (val) << "] "
// End if debugger utils
namespace Hasher
{
struct custom_hash
{
static uint32_t splitmix64(uint32_t x)
{
x += 0x9e3779b97f4a7c15;
x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
return x ^ (x >> 31);
}
size_t operator()(uint64_t x) const
{
static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
return splitmix64(x + FIXED_RANDOM);
}
};
struct hash_pair
{
template <class T1, class T2>
size_t operator()(const pair<T1, T2> &p) const
{
auto hash1 = custom_hash{}(p.first);
auto hash2 = custom_hash{}(p.second);
if (hash1 != hash2)
return hash1 ^ hash2;
return hash1;
}
};
struct hash_pair_pair
{
template <class T1, class T2>
size_t operator()(const pair<T1, T2> &p) const
{
auto hash1 = custom_hash{}(p.first);
auto hash2 = hash_pair{}(p.second);
if (hash1 != hash2)
return hash1 ^ hash2;
return hash1;
}
};
}
using namespace Hasher;
const string taskname = "";
const bool tc = false;
const int oo = 1e9, mod = 1e9 + 7;
const int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
const ll ool = 1e18;
const ldb eps = 1e-6;
const int MAXN = 1e6;
/*
Author: normankr07
Problem: JOI18_catdog
Submission links:
oj.uz
Editorial links:
https://s3-ap-northeast-1.amazonaws.com/data.cms.ioi-jp.org/open-2018/2018-open-catdog-sol-en.pdf
Algorithm:
Let us restate the problem in terms of graphs. Then the garden becomes a tree structure, and each hut becomes
a vertex. For simplicity, a hut with a cat is called a “red” vertex, and a hut with a dog is called a “blue” vertex
subtask 2 : DP
*/
vi adj[MAXN];
ll R[MAXN], B[MAXN];
char color[MAXN];
bool vis[MAXN];
int n;
// Initalize function (init your mom)
void initalize(int N, vi &a, vi &b)
{
for (int i = 0; i < n - 1; i++)
{
adj[a[i]].pb(b[i]);
adj[b[i]].pb(a[i]);
}
}
// DFS DP
void DFS(int u, int par)
{
R[u] = B[u] = 0;
for (auto v : adj[u])
{
if (v != par)
{
DFS(v, u);
B[v] = min(B[v], R[v] + 1);
R[v] = min(R[v], B[v] + 1);
}
}
if (color[u] == 'R')
R[u] = oo;
if (color[u] == 'B')
B[u] = oo;
}
int cat(int v)
{
color[v] = 'R';
DFS(1, -1);
return min(R[v], B[v]);
}
int dog(int v)
{
color[v] = 'B';
DFS(1, -1);
return min(R[v], B[v]);
}
int neighbor(int v)
{
color[v] = 'N';
DFS(1, -1);
return min(R[v], B[v]);
}
#ifdef LOCAL
void solve()
{
int N;
cin >> N;
vi A(N - 1), B(N - 1);
for (int i = 0; i < N - 1; i++)
cin >> A[i] >> B[i];
initalize(N, A, B);
int Q;
cin >> Q;
int t, v;
while (Q-- && cin >> t >> v)
{
switch (t)
{
case 1:
cout << cat(v);
break;
case 2:
cout << dog(v);
break;
case 3:
cout << neighbor(v);
break;
default:
break;
}
cout << el;
}
}
int32_t main()
{
if (fopen((taskname + ".inp").c_str(), "r"))
{
freopen((taskname + ".inp").c_str(), "r", stdin);
freopen((taskname + ".out").c_str(), "w", stdout);
}
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
int tsc = 1;
if (tc)
{
cin >> tsc;
}
while (tsc--)
{
solve();
cout << el;
}
cerr << "\n"
<< "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}
#endif