Submission #828675

#	Time	Username	Problem	Language	Result	Execution time	Memory
828675		GrindMachine	Amusement Park (JOI17_amusement_park)	C++17	83 / 100	18 ms	3676 KiB

Joi

// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

#include "Joi.h"

void Joi(int n, int m, int A[], int B[], long long X, int T) {
    vector<int> adj[n];

    rep(i,m){
        int u = A[i], v = B[i];
        adj[u].pb(v), adj[v].pb(u);
    }

    vector<int> cnt(n);
    vector<pii> group(n,{-1,-1});

    queue<pii> q;
    q.push({0,0});
    group[0] = {0,0};
    cnt[0]++;

    int ptr = 1;

    while(!q.empty()){
        auto [u,c] = q.front();
        q.pop();

        trav(v,adj[u]){
            if(group[v].ff != -1) conts;
            int id = c;
            if(cnt[c] == 60){
                id = ptr++;
            }

            q.push({v,id});
            group[v] = {id,cnt[id]++};
        }
    }

    rep(i,n){
        int bit = group[i].ss;
        int b = 0;
        if(X & (1ll<<bit)) b = 1;
        MessageBoard(i,b);
    }
}

Ioi

// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e4 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

#include "Ioi.h"

vector<int> adj2[60];
vector<bool> vis(60);
vector<int> actual_nodes(60);
vector<int> depth(60), deepest(60);
set<pii> st;
ll x_val = 0;

void dfs1(int u){
    vis[u] = 1;
    deepest[u] = depth[u];

    trav(v,adj2[u]){
        if(vis[v]) conts;
        st.insert({u,v});
        st.insert({v,u});
        depth[v] = depth[u]+1;
        dfs1(v);
        amax(deepest[u],deepest[v]);
    }
}

void dfs2(int u, int ret){
    vis[u] = 1;

    pii best = {-1,-1};
    trav(v,adj2[u]){
        if(vis[v]) conts;
        if(!st.count({u,v})) conts;
        pii px = {deepest[v],v};
        amax(best,px);
    }

    trav(v,adj2[u]){
        if(vis[v]) conts;
        if(!ret and v == best.ss) conts;
        if(!st.count({u,v})) conts;

        // cout << u << " " << v << endl;

        int b = Move(actual_nodes[v]);
        int bit = v;
        if(b) x_val |= (1ll<<bit);

        dfs2(v,1);

        // cout << u << " " << v << endl;

        Move(actual_nodes[u]);
    }

    if(!ret and best.ss != -1){
        int v = best.ss;

        // cout << u << " " << v << endl;
        
        int b = Move(actual_nodes[v]);
        int bit = v;
        if(b) x_val |= (1ll<<bit);

        dfs2(v,0);

        // cout << u << " " << v << endl;
        // Move(actual_nodes[u]);
    }
}

long long Ioi(int n, int m, int A[], int B[], int P, int V, int T) {
    vector<int> adj[n];

    rep(i,m){
        int u = A[i], v = B[i];
        adj[u].pb(v), adj[v].pb(u);
    }

    vector<int> cnt(n);
    vector<pii> group(n,{-1,-1});

    queue<pii> q;
    q.push({0,0});
    group[0] = {0,0};
    cnt[0]++;

    int ptr = 1;

    while(!q.empty()){
        auto [u,c] = q.front();
        q.pop();

        trav(v,adj[u]){
            if(group[v].ff != -1) conts;
            int id = c;
            if(cnt[c] == 60){
                id = ptr++;
            }

            q.push({v,id});
            group[v] = {id,cnt[id]++};
        }
    }

    rep(i,n){
        assert(cnt[i] <= 60);
    }

    // find closest good group
    queue<int> q2;
    vector<int> par(n,-1);
    q2.push(P);
    par[P] = P;

    int want = -1;

    while(!q2.empty()){
        int u = q2.front();
        q2.pop();
        int c = group[u].ff;
        if(cnt[c] == 60){
            want = u;
            break;
        }

        trav(v,adj[u]){
            if(par[v] == -1){
                q2.push(v);
                par[v] = u;
            }
        }
    }

    assert(want != -1);

    int root = group[want].ss;
    int root_val = V;

    vector<int> path;
    int o_want = want;

    while(want != P){
        path.pb(want);
        want = par[want];
    }

    reverse(all(path));

    trav(u,path){
        root_val = Move(u);
        P = u;
    }

    want = o_want;
    assert(P == want);

    int want_col = group[want].ff;

    rep(u,n){
        if(group[u].ff == want_col){
            actual_nodes[group[u].ss] = u;
        }
    }

    rep(u,n){
        trav(v,adj[u]){
            if(group[u].ff == want_col and group[v].ff == want_col){
                int x = group[u].ss;
                int y = group[v].ss;
                adj2[x].pb(y);
                adj2[y].pb(x);
            }
        }
    }

    if(root_val) x_val |= (1ll<<root);

    dfs1(root);
    fill(all(vis),0);
    dfs2(root,0);

    return x_val;
}

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