oj.uz

Submission #763432

# Submission time Handle Problem Language Result Execution time Memory
763432 2023-06-22T09:54:07 Z boris_mihov Tropical Garden (IOI11_garden) C++17
0 / 100
 2 ms 4180 KB 
#include "garden.h"
#include "gardenlib.h"
#include <algorithm>
#include <iostream>
#include <numeric>
#include <cstring>
#include <cassert>
#include <vector>
 
typedef long long llong;
const int MAXN = 150000 + 10;
const int INF  = 1e9;
 
int n, m, p, q;
int dp[MAXN][2];
int cnt[MAXN][2];
std::vector <std::pair <int,int>> g[MAXN];
bool vis[MAXN][2];
 
void dfs(int node, bool next, int edges, bool firstEdge)
{
    if (next == false)
    {
        cnt[edges][firstEdge]++;
    }
 
    vis[node][next] = true;
    int l = 0, r = g[node].size();
    if (next || g[node].size() == 1)
    {
        r = 1;
    } else
    {
        l = 1;
    }
 
    for (int i = l ; i < r ; ++i)
    {
        auto [u, t] = g[node][i];
        if (t == g[u][0].second && !vis[u][0])
        {
            dfs(u, 0, edges + 1, firstEdge);
            continue;
        }
 
        if (t == g[u][1].second && !vis[u][1])
        {
            dfs(u, 1, edges + 1, firstEdge);
            continue;
        }
    }
}
 
std::pair <int,int> dfsCycle(int node, bool fromMAX, int time)
{
    if (time != 0 && node == p)
    {
        return {time, fromMAX};
    }
 
    if (vis[node][fromMAX])
    {
        return {-1, -1};
    }
 
    vis[node][fromMAX] = true;
    if (!fromMAX || g[node].size() == 1)
    {
        return dfsCycle(g[node][0].first, (g[node][0].second == g[g[node][0].first][0].second), time + 1);
    } else
    {
        return dfsCycle(g[node][1].first, (g[node][1].second == g[g[node][1].first][0].second), time + 1);
    }
}
 
void count_routes(int N, int M, int P, int R[][2], int Q, int G[])
{
    n = N;
    m = M;
    p = P + 1;
    q = Q;
 
    for (int i = 0 ; i < m ; ++i)
    {
        g[R[i][0] + 1].push_back({R[i][1] + 1, i + 1});
        g[R[i][1] + 1].push_back({R[i][0] + 1, i + 1});
    }
 
    for (int i = 1 ; i <= n ; ++i)
    {
        std::sort(g[i].begin(), g[i].end(), [&](auto a, auto b)
        {
            return a.second < b.second;
        });
    }
 
    vis[p][0] = vis[p][1] = true;
    for (const auto &[u, t] : g[p])
    {
        if (t == g[u][0].second)
        {
            dfs(u, 0, 1, (t == g[p][0].second));
            continue;
        } 
 
        if (t == g[u][1].second)
        {
            dfs(u, 1, 1, (t == g[p][0].second));
            continue;
        }
    }
    
    std::pair <int,int> cycle[2];
    memset(vis, false, sizeof(vis));
    cycle[0] = dfsCycle(p, 0, 0);
 
    memset(vis, false, sizeof(vis));
    cycle[1] = dfsCycle(p, 1, 0);
 
    for (int i = 1 ; i <= 100 ; ++i)
    {
        for (int j = 0 ; j < 2 ; ++j)
        {
            dp[i][j] += cnt[i][j];
            if (cycle[j].first != -1)
            {
                dp[i + cycle[j].first][cycle[j].second] += dp[i][j];
            }
        }
    }
 
    for (int i = 0 ; i < q ; ++i)
    {
        answer(dp[G[i]][0] + dp[G[i]][1]);
    }
}

Subtask #1
0 / 49.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4180 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4180 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4180 KB Output isn't correct
2 Halted 0 ms 0 KB -