Submission #1278651

#	Time	Username	Problem	Language	Result	Execution time	Memory
1278651		thieunguyenhuy	Amusement Park (JOI17_amusement_park)	C++20	10 / 100	22 ms	2404 KiB

Joi

#ifndef hwe
	#include "Joi.h"
#endif

#include <bits/stdc++.h>
using namespace std;

#define POPCOUNT(n) (__builtin_popcountll((n)))
#define CLZ(n) (__builtin_clzll((n)))
#define CTZ(n) (__builtin_ctzll((n)))
#define LOG(n) (63 - __builtin_clzll((n)))
#define BIT(n, i) (((n) >> (i)) & 1ll)
#define MASK(i) (1ll << (i))
#define FLIP(n, i) ((n) ^ (1ll << (i)))
#define ON(n, i) ((n) | MASK(i))
#define OFF(n, i) ((n) & ~MASK(i))

#define Int __int128
#define fi first
#define se second

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long long, int> pli;
typedef pair<int, long long> pil;
typedef vector<pair<int, int>> vii;
typedef vector<pair<long long, long long>> vll;
typedef vector<pair<long long, int>> vli;
typedef vector<pair<int, long long>> vil;

template <class T1, class T2> bool maximize(T1 &x, T2 y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}
template <class T1, class T2> bool minimize(T1 &x, T2 y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}

template <class T> void remove_duplicate(vector<T> &ve) {
    sort (ve.begin(), ve.end());
    ve.resize(unique(ve.begin(), ve.end()) - ve.begin());
}

const int N = 1e6 + 5, LG = 60;
const int MOD = 1e9 + 7;
const int inf = 1e9;
const long long INF = 1e18;

#ifdef hwe
void MessageBoard(int u, int msg) {
	cerr << "message " << u << ' ' << msg << endl;
}
#endif

namespace JOI {
	int info[N], dep[N];
	vector<int> adj[N], order;
	bitset<N> vis;

	void dfs(int u) {
		order.emplace_back(u); vis[u] = true;
		for (auto v : adj[u]) if (!vis[v]) {
			dep[v] = dep[u] + 1;
			dfs(v);
		}
	}

	void Joi(int n, int m, int a[], int b[], ll X, int subtask) {
		for (int i = 0; i < m; ++i) {
			adj[a[i]].emplace_back(b[i]);
			adj[b[i]].emplace_back(a[i]);
		}

		order.clear();
		dfs(0);

		if (*max_element(dep, dep + n) + 1 >= LG) {
			for (int i = 0; i < n; ++i)
				MessageBoard(i, BIT(X, dep[i] % LG));
			return;
		}

		vector<int> ve, state(n, 0);
		// state[i]: 0: not visited, 1: activated, 2: deleted

		for (int i = 0; i < LG; ++i) {
			info[order[i]] = i;
			state[order[i]] = 1, ve.emplace_back(order[i]);
		}

		for (int i = LG; i < n; ++i) {
			state[order[i]] = 1, ve.emplace_back(order[i]);
			for (int j = 0; j < ve.size(); ++j) {
				int u = ve[j], cnt = 0;
				for (auto v : adj[u]) cnt += (state[v] != 2);
				if (cnt > 1) continue; // this is a leaf in the component
				info[order[i]] = info[u], state[u] = 2;
				ve.erase(ve.begin() + j);
				break;
			}
		}

		for (int i = 0; i < n; ++i)
			cerr << info[i] << ' ';
		cerr << '\n';

		for (int i = 0; i < n; ++i)
			MessageBoard(i, BIT(X, info[i]));
	}
}

void Joi(int n, int m, int a[], int b[], ll X, int subtask) {
	JOI::Joi(n, m, a, b, X, subtask);
}

#ifdef hwe
int a[N], b[N];

signed main() {
	int n, m; cin >> n >> m;
	ll X; cin >> X;

	for (int i = 0; i < m; ++i) cin >> a[i] >> b[i];

	Joi(n, m, a, b, X, 0);

    return 0;
}
#endif

Ioi

#include "Ioi.h"
#include <bits/stdc++.h>

using namespace std;
using ll = long long;
#define all(x) x.begin(), x.end()

static vector<int> adj[10000], order;
static int seen[10000], depth[10000], par[10000], idx[10000];
static ll X;

static void dfs(int i) {
    seen[i] = true;
    order.emplace_back(i);
    for (int j: adj[i]) {
        if (seen[j]) continue;
        depth[j] = depth[par[j] = i] + 1;
        dfs(j);
    }
}

static void dfs2(int i) {
    seen[i] = false;
    for (int j: adj[i]) {
        if (seen[j] != 1) continue;
        X |= (ll) Move(j) << idx[j];
        dfs2(j);
        Move(i);
    }
}

ll Ioi(int N, int M, int A[], int B[], int P, int V, int T) {
    while (M--) {
        adj[A[M]].emplace_back(B[M]);
        adj[B[M]].emplace_back(A[M]);
    }
    dfs(0);
    if (*max_element(depth, depth + N) >= 59) {
        if (depth[P] >= 59) {
            X = (ll) V << (depth[P] % 60);
            for (int i = 59; i--; P = par[P]) X |= (ll) Move(par[P]) << (depth[par[P]] % 60);
            return X;
        }
        X = V;
        while (P) X = Move(P = par[P]);
        for (int i = N; i--;) {
            if (depth[i] == 59) {
                order = {i};
                while (order.back()) order.emplace_back(par[order.back()]);
                reverse(all(order));
                for (int i = 1; i < 60; ++i) X |= (ll) Move(order[i]) << i;
                return X;
            }
        }
        assert(false);
    }
    memset(seen, false, sizeof seen);
    vector<int> sub(order.begin(), order.begin() + 60);
    for (int i = 60; i--;) {
        seen[sub[i]] = true;
        idx[sub[i]] = i;
    }
    for (int i = 60; not seen[P]; ++i) {
        seen[order[i]] = true;
        for (int j: sub) {
            int cnt = 0;
            for (int k: adj[j]) cnt += seen[k] != 2;
            if (cnt > 1) continue;
            idx[order[i]] = idx[j];
            sub.erase(find(all(sub), j));
            seen[j] = 2;
            break;
        }
        sub.emplace_back(order[i]);
    }
    X = (ll) V << idx[P];
    dfs2(P);
    return X;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 55
• Subtask 5: 0 / 17