Submission #1228673

#	Time	Username	Problem	Language	Result	Execution time	Memory
1228673		lrnnz	Split the Attractions (IOI19_split)	C++20	22 / 100	566 ms	1114112 KiB

split

#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <queue>
#include "split.h"
using namespace std;

#define all(a) (a).begin(), (a).end()
#define sz(a) (int)(a).size()
#define ll long long
#define ld long double
#define ui uint64_t
#define cont(set, element) ((set).find(element) != (set).end())

/********* DEBUG *********/

template <typename T>
void outvec(const vector<T>& Z){
    for (const T& x : Z)
    cout << x << ' ';
    cout << "\n";
}
void printVariable(const any& var) {
    if (!var.has_value()) {
        cout << "null";
        return;
    }

    if (var.type() == typeid(int)) {
        cout << any_cast<int>(var);
    } else if (var.type() == typeid(double)) {
        cout << any_cast<double>(var);
    } else if (var.type() == typeid(float)) {
        cout << any_cast<float>(var);
    } else if (var.type() == typeid(char)) {
        cout << any_cast<char>(var);
    } else if (var.type() == typeid(bool)) {
        cout << (any_cast<bool>(var) ? "true" : "false");
    } else if (var.type() == typeid(string)) {
        cout << any_cast<string>(var);
    } else if (var.type() == typeid(const char*)) {
        cout << any_cast<const char*>(var);
    } else if (var.type() == typeid(long long)) {
        cout << any_cast<long long>(var);
    } else {
        cout << "[unknown type]";
    }
}

template<typename... Args>
void outval(Args... args) {
    vector<any> variables = {args...};
    
    for (size_t i = 0; i < variables.size(); ++i) {
        printVariable(variables[i]);
        if (i != variables.size() - 1) {
            cout << " ";
        }
    }
    cout << "\n";
}

#define sp << " " <<

/********* DEBUG *********/

const ll MOD = 1e9+7;
const ll MOD2 = 998244353;
const ll inf = 1e18;
const ll mxN = 2000005;

ll lo, hi, lo_nd, hi_nd, N;
ll dfs(ll curr, vector<vector<ll>> &adj, ll par = -1, ll sum = 1){
    if (lo_nd != -1)
        return 0;
    
    for (auto &x : adj[curr]){
        if (x == par)
            continue;

        ll c = dfs(x, adj, curr);

        if (lo_nd != -1)
            return 0;

        if (c >= lo && N-c >= hi){
            hi_nd = curr;
            lo_nd = x;
            return 0;
        }    

        if (c >= hi && N-c >= lo){
            hi_nd = x;
            lo_nd = curr;
            return 0;
        }

        sum += c;
    }

    return sum;
}

vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> v) {
    vector<vector<ll>> adj(n);
    for (int i = 0; i < p.size(); i++){
        adj[p[i]].push_back(v[i]);
        adj[v[i]].push_back(p[i]);
    }

    vector<pair<ll,ll>> labels = {{a, 1}, {b, 2}, {c, 3}};
    sort(all(labels));

    lo = labels[0].first;
    hi = labels[1].first;
    lo_nd = hi_nd = -1;
    N = n;

    dfs(0, adj);

    if (lo_nd == -1){
        return vector<int>(n, 0);
    }

    vector<int> ans(n, labels[2].second);

    vector<bool> vis(n);
    queue<int> q;

    vis[hi_nd] = true;
    q.push(lo_nd);
    // do lo
    while (q.size() && labels[0].first){
        int nd = q.front(); q.pop();
        if (vis[nd])
            continue;

        vis[nd] = true;
        ans[nd] = labels[0].second;
        labels[0].first--;

        for (auto &x : adj[nd]){
            if (vis[x])
                continue;

            q.push(x);
        }
    }

    while (q.size())
        q.pop();

    vis[hi_nd] = false;
    q.push(hi_nd);

    while (q.size() && labels[1].first){
        int nd = q.front(); q.pop();
        if (vis[nd])
            continue;

        vis[nd] = true;
        ans[nd] = labels[1].second;

        labels[1].first--;

        for (auto &x : adj[nd]){
            if (vis[x])
                continue;

            q.push(x);
        }
    }

    return ans;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 22 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36