Submission #1063220

#	Time	Username	Problem	Language	Result	Execution time	Memory
1063220		Boas	Tropical Garden (IOI11_garden)	C++17	0 / 100	1 ms	860 KiB

garden

#include "gardenlib.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int, int> ii;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef vector<vii> vvii;
#define loop(x, i) for (int i = 0; i < x; i++)
#define pb push_back

void count_routes(int N, int M, int P, int R[][2], int Q, int G[])
{
    vvii adj(N);
    loop(M, i)
    {
        adj[R[i][0]].pb({i, R[i][1]});
        adj[R[i][1]].pb({i, R[i][0]});
    }
    vvi p(30, vi(2 * N));
    loop(N, i)
    {
        int j = adj[i][0].second;
        if (adj[j][0].second == i)
            j += N;
        p[0][i] = j;
        if (adj[i].size() == 1)
        {
            p[0][i + N] = j;
        }
        else
        {
            int j = adj[i][1].second;
            if (adj[j][0].second == i)
                j += N;
            p[0][i + N] = j;
        }
    }
    loop(30, x)
    {
        loop(N, i)
        {
            int half = p[x - 1][i];
            p[x][i] = p[x - 1][half];
        }
    }
    auto nthParent = [&](auto &&self, int i, int n) -> int
    {
        loop(30, x)
        {
            if ((1 << x) & n)
            {
                i = p[x][i];
            }
        }
        return i;
    };
    for (int i = 0; i < Q; i++)
    {
        int K = G[i];
        int cnt = 0;
        loop(N, start)
        {
            if (nthParent(nthParent, start, K) % N == P)
                cnt++;
        }
        answer(cnt);
    }
}

• Subtask 1: 0 / 49
• Subtask 2: 0 / 20
• Subtask 3: 0 / 31