Submission #420517

#	Time	Username	Problem	Language	Result	Execution time	Memory
420517		yuto1115	Split the Attractions (IOI19_split)	C++17	22 / 100	537 ms	1048580 KiB

split

#include "split.h"
#include <bits/stdc++.h>
#define rep(i, n) for(ll i = 0; i < ll(n); i++)
#define rep2(i, s, n) for(ll i = ll(s); i < ll(n); i++)
#define rrep(i, n) for(ll i = ll(n)-1; i >= 0; i--)
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define pb push_back
#define eb emplace_back
using namespace std;
using ll = long long;
using P = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vp = vector<P>;
using vvp = vector<vp>;
using vb = vector<bool>;
using vvb = vector<vb>;
using vs = vector<string>;

template<class T>
bool chmin(T &a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}

template<class T>
bool chmax(T &a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

const int inf = 1001001001;
const ll linf = 1001001001001001001;

vi find_split(int n, int a, int b, int c, vi p, vi q) {
    vvi G(n);
    rep(i, p.size()) {
        G[p[i]].pb(q[i]);
        G[q[i]].pb(p[i]);
    }
    vp ls = {{a, 1},
             {b, 2},
             {c, 3}};
    sort(all(ls));
    vi ans(n);
    int rem;
    auto solve = [&](auto &solve, int u, int p, int num) -> void {
        rem--;
        ans[u] = num;
        for (int v : G[u]) {
            if (!rem) break;
            if (v == p) continue;
            solve(solve, v, u, num);
        }
    };
    auto dfs = [&](auto &dfs, int u, int p) -> int {
        int res = 1;
        for (int v : G[u]) {
            if (v == p) continue;
            int now = dfs(dfs, v, u);
            if (ans[0]) break;
            res += now;
            if (now >= ls[0].first and n - now >= ls[1].first) {
                cerr << u << ' ' << v << endl;
                rem = ls[0].first;
                solve(solve, v, u, ls[0].second);
                rem = ls[1].first;
                solve(solve, u, v, ls[1].second);
                rep(i, n) if (!ans[i]) ans[i] = ls[2].second;
                break;
            }
            if (now >= ls[1].first and n - now >= ls[0].first) {
                rem = ls[1].first;
                solve(solve, v, u, ls[1].second);
                rem = ls[0].first;
                solve(solve, u, v, ls[0].second);
                rep(i, n) if (!ans[i]) ans[i] = ls[2].second;
            }
        }
        return res;
    };
    dfs(dfs, 0, -1);
    return ans;
}

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