oj.uz

답안 #1026883

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1026883 2024-07-18T12:51:47 Z onbert 열대 식물원 (Tropical Garden) (IOI11_garden) C++17
100 / 100
 1406 ms 38576 KB 
#include "garden.h"
#include "gardenlib.h"
#include <bits/stdc++.h>
using namespace std;
const int maxn = 150005, maxm = 150005, INF = 1e9;
int n, m, p;
vector<int> adj[maxn];
int vis[maxn][2];
int dist[maxn][2][2];
vector<pair<int,int>> track;
int cyclesz[2] = {INF, INF};

int dfs(int u) {
    int id = (track.size()>0 && track.back().first==adj[u][0] && adj[u].size()>1);
    // cout << u << " " << id << " " << vis[u][id] << endl;
    if (vis[u][id]==-3) return id;
    if (vis[u][id]==-2) {
        // cout << u << " " << id << endl;
        vector<pair<int,int>> c;
        reverse(track.begin(), track.end());
        for (auto [i, j]:track) {
            c.push_back({i, j});
            if (i==u && j==id) break;
        }
        int sz = c.size(), pos = -1;
        for (int i=0;i<sz;i++) if (c[i].first==p && c[i].second==0) pos = i;
        if (pos!=-1) {
            cyclesz[0] = sz;
            for (int i=0;i<sz;i++) {
                int cur = (i+pos)%sz;
                dist[c[cur].first][c[cur].second][0] = i;
            }
        }

        pos = -1;
        for (int i=0;i<sz;i++) if (c[i].first==p && c[i].second==1) pos = i;
        if (pos!=-1) {
            // cout << pos << endl;
            cyclesz[1] = sz;
            for (int i=0;i<sz;i++) {
                int cur = (i+pos)%sz;
                dist[c[cur].first][c[cur].second][1] = i;
                // cout << "cost " << c[cur].first << " " << c[cur].second << " " << i << endl;
            }
        }
        return id;
    }
    vis[u][id] = -2;
    track.push_back({u, id});
    int v = adj[u][id];
    int nxt = dfs(v);
    for (int i=0;i<=1;i++) {
        if (dist[u][id][i]==-1 && dist[v][nxt][i]!=-1) dist[u][id][i] = dist[v][nxt][i] + 1;
    }
    if (u==p) dist[u][id][id] = 0;
    vis[u][id] = -3;
    return id;
}

void count_routes(int N, int M, int P, int R[][2], int Q, int G[]) {
    n = N, m = M, p = P;
    for (int i=0;i<m;i++) {
        int u = R[i][0], v = R[i][1];
        if (adj[u].size()<2) adj[u].push_back(v);
        if (adj[v].size()<2) adj[v].push_back(u);
    }
    for (int i=0;i<n;i++) vis[i][0] = vis[i][1] = dist[i][0][0] = dist[i][1][0] = dist[i][0][1] = dist[i][1][1] = -1;
    for (int i=0;i<n;i++) if (vis[i][0]==-1) {
        track.clear();
        dfs(i);
    }
    // cout << cyclesz[0] << " " << cyclesz[1] << endl;
    for (int i=0;i<Q;i++) {
        int x = G[i];
        int32_t ans = 0;
        for (int i=0;i<n;i++) {
            bool add = false;
            for (int j=0;j<=1;j++) {
                if (dist[i][0][j]!=-1 && x>=dist[i][0][j] && (x-dist[i][0][j])%cyclesz[j]==0) add = true;
            }
            ans += add;
        }
        answer(ans);
    }
}

Subtask #1
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 3 ms 6492 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 3 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 7 ms 10328 KB Output is correct
12 Correct 10 ms 11240 KB Output is correct
13 Correct 34 ms 38152 KB Output is correct
14 Correct 31 ms 14684 KB Output is correct
15 Correct 35 ms 14676 KB Output is correct
16 Correct 26 ms 13548 KB Output is correct
17 Correct 41 ms 12716 KB Output is correct
18 Correct 11 ms 10588 KB Output is correct
19 Correct 26 ms 14696 KB Output is correct
20 Correct 34 ms 14672 KB Output is correct
21 Correct 34 ms 13396 KB Output is correct
22 Correct 26 ms 12624 KB Output is correct
23 Correct 29 ms 15956 KB Output is correct

Subtask #3
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 3 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 7 ms 10328 KB Output is correct
12 Correct 10 ms 11240 KB Output is correct
13 Correct 34 ms 38152 KB Output is correct
14 Correct 31 ms 14684 KB Output is correct
15 Correct 35 ms 14676 KB Output is correct
16 Correct 26 ms 13548 KB Output is correct
17 Correct 41 ms 12716 KB Output is correct
18 Correct 11 ms 10588 KB Output is correct
19 Correct 26 ms 14696 KB Output is correct
20 Correct 34 ms 14672 KB Output is correct
21 Correct 34 ms 13396 KB Output is correct
22 Correct 26 ms 12624 KB Output is correct
23 Correct 29 ms 15956 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 65 ms 10332 KB Output is correct
26 Correct 116 ms 11096 KB Output is correct
27 Correct 685 ms 38092 KB Output is correct
28 Correct 675 ms 14728 KB Output is correct
29 Correct 621 ms 14632 KB Output is correct
30 Correct 361 ms 13488 KB Output is correct
31 Correct 410 ms 12768 KB Output is correct
32 Correct 109 ms 10584 KB Output is correct
33 Correct 702 ms 14632 KB Output is correct
34 Correct 561 ms 14844 KB Output is correct
35 Correct 343 ms 13352 KB Output is correct
36 Correct 865 ms 12748 KB Output is correct
37 Correct 554 ms 15952 KB Output is correct
38 Correct 1406 ms 38576 KB Output is correct