Submission #420453

#	Time	Username	Problem	Language	Result	Execution time	Memory
420453		yuto1115	Split the Attractions (IOI19_split)	C++17	18 / 100	119 ms	12780 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]);
    }
    vi ls;
    vb seen(n);
    auto dfs = [&](auto &dfs, int u, int p) -> void {
        ls.pb(u);
        seen[u] = true;
        for (int v : G[u]) {
            if (v == p) continue;
            if(seen[v]) continue;
            dfs(dfs, v, u);
        }
    };
    rep(i, n) {
        if (G[i].size() == 1) {
            dfs(dfs, i, -1);
            break;
        }
    }
    if (ls.empty()) {
        dfs(dfs, 0, -1);
    }
    vi ans(n);
    rep(i, a) ans[ls[i]] = 1;
    rep2(i, a, a + b) ans[ls[i]] = 2;
    rep2(i, a + b, n) ans[ls[i]] = 3;
    return ans;
}

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