oj.uz

Submission #470920

# Submission time Handle Problem Language Result Execution time Memory
470920 2021-09-06T09:53:12 Z Tentacleslave Keys (IOI21_keys) C++17
37 / 100
 3000 ms 521624 KB 
#include <cstdio>
#include <vector>
#include <deque>
#include <algorithm>
#include <set>
 
using namespace std;
 
int increment = 0;
vector<vector<int>> room_group_keys;
vector<vector<int>> room_group_rooms;
vector<vector<pair<int, int>>> connector;
vector<int> stack;
vector<int> mutex, depth;
 
void dfs_init() {
    stack.clear();
    increment = 0;
    mutex.resize(room_group_keys.size());
    for(auto& i : mutex) i = 0;
    depth.resize(room_group_keys.size());
    for(auto& i : depth) i = 0;
}
 
void dfs(int x) {
    if(mutex[x] == 1) return;
    mutex[x] = 1;
    for(auto i : connector[x]) {
        if(binary_search(room_group_keys[x].begin(), room_group_keys[x].end(), i.second))
            dfs(i.first);
    }
    stack.push_back(x);
}
 
bool rdfs(int x) {
    if(mutex[x] == 2) return false;
    mutex[x] = 2;
    depth[x] = increment;
    for(auto i : connector[x]) {
        if(binary_search(room_group_keys[i.first].begin(), room_group_keys[i.first].end(), i.second))
            rdfs(i.first);
    }
    return true;
}
 
void dfs_final(int x, vector<int>& logging) {
    if(mutex[x] == 1)
        return;
    mutex[x] = 1;
    for(auto i : connector[x]) {
        if(binary_search(room_group_keys[x].begin(), room_group_keys[x].end(), i.second)) {
            if(x != i.first)
                logging[x] = false;
            dfs_final(i.first, logging);
        }
    }
}
 
vector<int> find_reachable_internal() {
    int prev = room_group_keys.size();
    // To-do: construct SCC
    dfs_init();
    for(int i = 0; i < room_group_keys.size(); i++) dfs(i);
    while(stack.size()) {
        int top = stack.back();
        if(rdfs(top))
            increment++;
        stack.pop_back();
    }
    // Report result (if SCC is equal with graph)
    if(prev == increment) {
        dfs_init();
        vector<int> logging;
        logging.resize(prev, true);
        for(int i = 0; i < prev; i++)
            dfs_final(i, logging);
        
        int min_size = 1e9, sum = 0;
        for(int i = 0; i < prev; i++) {
            int s = room_group_rooms[i].size();
            sum += s;
            if(min_size > s && logging[i])
                min_size = s;
        }
        vector<int> ans;
        ans.resize(sum, 0);
 
        
        for(int i = 0; i < prev; i++) {
            int s = room_group_rooms[i].size();
            if(min_size != s || !logging[i])
                continue;
            for(auto j : room_group_rooms[i]) {
                ans[j] = 1;
            }
        }
        return ans;
    }
 
    // Query (if SCC is smaller than graph)
    vector<vector<int>> new_room_group_keys;
    vector<vector<int>> new_room_group_rooms;
    vector<vector<pair<int, int>>> new_connector;
    new_room_group_keys.resize(increment, {});
    new_room_group_rooms.resize(increment, {});
    new_connector.resize(increment, {});
    for(int i = 0; i < prev; i++) {
        for(auto j : room_group_keys[i])
            new_room_group_keys[depth[i]].push_back(j);
        for(auto j : room_group_rooms[i])
            new_room_group_rooms[depth[i]].push_back(j);
        for(auto j : connector[i]) {
            if(depth[i] != depth[j.first])
                new_connector[depth[i]].push_back({depth[j.first], j.second});
        }
    }
    for(int i = 0; i < increment; i++)
        sort(new_room_group_keys[i].begin(), new_room_group_keys[i].end());
    
    room_group_keys = new_room_group_keys;
    room_group_rooms = new_room_group_rooms;
    connector = new_connector;
    //return {};
    return find_reachable_internal();
}
 
vector<int> find_reachable(vector<int> r, vector<int> u, vector<int> v, vector<int> c) {
    // vector<vector<int>> room_group_keys, vector<vector<int>> room_group_rooms, vector<vector<pair<int, int>>> connector
    connector.resize(r.size(), {});
    for(int i = 0; i < r.size(); i++) {
        room_group_keys.push_back({r[i]});
        room_group_rooms.push_back({i});
    }
    for(int i = 0; i < u.size(); i++) {
        connector[u[i]].push_back({v[i], c[i]});
        connector[v[i]].push_back({u[i], c[i]});
    }
    for(int i = 0; i < r.size(); i++)
        std::sort(room_group_keys[i].begin(), room_group_keys[i].end());
    connector.resize(r.size());
    return find_reachable_internal();
}

Compilation message

keys.cpp: In function 'std::vector<int> find_reachable_internal()':
keys.cpp:63:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for(int i = 0; i < room_group_keys.size(); i++) dfs(i);
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~~~
keys.cpp: In function 'std::vector<int> find_reachable(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
keys.cpp:130:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  130 |     for(int i = 0; i < r.size(); i++) {
      |                    ~~^~~~~~~~~~
keys.cpp:134:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  134 |     for(int i = 0; i < u.size(); i++) {
      |                    ~~^~~~~~~~~~
keys.cpp:138:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  138 |     for(int i = 0; i < r.size(); i++)
      |                    ~~^~~~~~~~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 2 ms 716 KB Output is correct
28 Correct 2 ms 716 KB Output is correct
29 Correct 2 ms 716 KB Output is correct
30 Correct 2 ms 588 KB Output is correct
31 Correct 2 ms 460 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 460 KB Output is correct
34 Correct 1 ms 460 KB Output is correct
35 Correct 2 ms 460 KB Output is correct
36 Correct 2 ms 716 KB Output is correct
37 Correct 2 ms 716 KB Output is correct
38 Correct 2 ms 844 KB Output is correct
39 Correct 3 ms 844 KB Output is correct
40 Correct 2 ms 460 KB Output is correct
41 Correct 3 ms 588 KB Output is correct

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Execution timed out 3076 ms 521624 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #5
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 2 ms 716 KB Output is correct
28 Correct 2 ms 716 KB Output is correct
29 Correct 2 ms 716 KB Output is correct
30 Correct 2 ms 588 KB Output is correct
31 Correct 2 ms 460 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 460 KB Output is correct
34 Correct 1 ms 460 KB Output is correct
35 Correct 2 ms 460 KB Output is correct
36 Correct 2 ms 716 KB Output is correct
37 Correct 2 ms 716 KB Output is correct
38 Correct 2 ms 844 KB Output is correct
39 Correct 3 ms 844 KB Output is correct
40 Correct 2 ms 460 KB Output is correct
41 Correct 3 ms 588 KB Output is correct
42 Execution timed out 3076 ms 521624 KB Time limit exceeded
43 Halted 0 ms 0 KB -