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Submission #991235

# Submission time Handle Problem Language Result Execution time Memory
991235 2024-06-01T15:37:57 Z model_code Drivers (BOI24_drivers) C++17
100 / 100
 280 ms 14888 KB 
#include <iostream>
#include <algorithm>

using namespace std;

const int MAXN = 1000001;
const int MAXM = 1000001;
const int MAXZ = 1000001;

struct edge {
    int start, end;
    int length;
    
    bool operator <(const edge &that) const {
        return this->length < that.length;
    }
};
edge edges[MAXM];


//Union-find data structure
//Only one of optimisations required to perform well
//So students could actually figure them out by themselves
int parent[MAXN];
int height[MAXN];

void init(int n) {
    for (int i = 0; i <= n; i++)
        parent[i] = i;
}

//Performs path compression
int find(int a) {
    if (a == parent[a])
        return a;
    return parent[a] = find(parent[a]);
}

//Performs union by rank
void combine(int a, int b) {
    int p_a = find(a);
    int p_b = find(b);
    
    if (height[p_a] < height[p_b])
        parent[p_a] = p_b;
    else if(height[p_a] > height[p_b])
        parent[p_b] = p_a;
    else {
        parent[p_a] = p_b;
        height[p_b]++;
    }
    
}

bool same(int a, int b) {
    return find(a) == find(b);
}

struct query {
    int id;
    int start, end;
    int length;
    
    const bool operator<(const query &that) const {
        return this->length < that.length;
    }
};
query queries[MAXZ];
bool results[MAXZ];


int n, m, z;

int main(int argc, const char * argv[]) {
    ios_base::sync_with_stdio(false); 
    cin.tie(0);

    cin >> n >> m >> z;
    
    for (int i = 0; i < m; i++) {
        cin >> edges[i].start >> edges[i].end >> edges[i].length;
    }
    for (int i = 0; i < z; i++) {
        queries[i].id = i;
        cin >> queries[i].start >> queries[i].end >> queries[i].length;
    }
    
    sort(edges, edges + m);
    sort(queries, queries + z);
    
    init(n);
    
    
    int cur_edge = 0;
    for (int i = 0; i < z; i++) {
        query &q = queries[i];
        
        while (cur_edge < m && edges[cur_edge].length <= q.length) {
            edge e = edges[cur_edge++];
            combine(e.start, e.end);
        }
        results[q.id] = same(q.start, q.end);
    }
    
    for (int i = 0; i < z; i++)
        cout << (results[i] ? "TAIP" : "NE") << endl;
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 227 ms 7076 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 3 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 3 ms 604 KB Output is correct
12 Correct 3 ms 476 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 7 ms 604 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 13 ms 1132 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 12 ms 1060 KB Output is correct
25 Correct 0 ms 348 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 227 ms 7076 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 3 ms 604 KB Output is correct
10 Correct 3 ms 604 KB Output is correct
11 Correct 7 ms 604 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 227 ms 7076 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 3 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 3 ms 604 KB Output is correct
17 Correct 3 ms 476 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 7 ms 604 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 13 ms 1132 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 2 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 12 ms 1060 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 2 ms 604 KB Output is correct
34 Correct 3 ms 604 KB Output is correct
35 Correct 3 ms 604 KB Output is correct
36 Correct 7 ms 604 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct

Subtask #5
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 227 ms 7076 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 3 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 3 ms 604 KB Output is correct
17 Correct 3 ms 476 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 7 ms 604 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 13 ms 1132 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 2 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 12 ms 1060 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 2 ms 604 KB Output is correct
34 Correct 3 ms 604 KB Output is correct
35 Correct 3 ms 604 KB Output is correct
36 Correct 7 ms 604 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
41 Correct 280 ms 14888 KB Output is correct
42 Correct 15 ms 1372 KB Output is correct
43 Correct 11 ms 1372 KB Output is correct
44 Correct 10 ms 1736 KB Output is correct
45 Correct 18 ms 1572 KB Output is correct
46 Correct 14 ms 1116 KB Output is correct
47 Correct 161 ms 11672 KB Output is correct
48 Correct 23 ms 1624 KB Output is correct
49 Correct 246 ms 14680 KB Output is correct