oj.uz

Submission #249467

# Submission time Handle Problem Language Result Execution time Memory
249467 2020-07-15T05:46:10 Z cheeheng Meetings (JOI19_meetings) C++14
29 / 100
 2000 ms 9104 KB 
#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;

int lca[2005][2005];

vector<int> AdjList[2005];

vector<int> toposort;
bool visited[2005];

void dfs(int u){
    if(visited[u]){return;}
    visited[u] = true;
    //printf("dfs(%d)\n", u);
    for(int v: AdjList[u]){
        dfs(v);
    }
    toposort.push_back(u);
}

void Solve(int N) {
    lca[0][0] = 0;
    for(int i = 1; i < N; i ++){
        lca[0][i] = 0;
        lca[i][0] = 0;
    }
    for(int i = 1; i < N; i ++){
        lca[i][i] = i;
        for(int j = i+1; j < N; j ++){
            lca[i][j] = Query(0, i, j);
            lca[j][i] = lca[i][j];
        }
    }

    if(N > 300){
        throw;
    }

    for(int i = 0; i < N; i ++){
        for(int j = 0; j < N; j ++){
            if(i == j){continue;}
            if(lca[i][j] == i){
                AdjList[i].push_back(j);
            }
        }
    }
    dfs(0);
    reverse(toposort.begin(), toposort.end());

    /*printf("Toposort: ");
    for(int i = 0; i < N; i ++){
        printf("%d ", toposort[i]);
    }
    printf("\n");*/

    for(int i = N-1; i >= 1; i --){
        for(int j = i-1; j >= 0; j --){
            int u = toposort[i];
            int v = toposort[j];
            if(lca[u][v] == v){
                Bridge(min(u, v), max(u, v));
                break;
            }
        }
    }
    return;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 512 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 512 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 1 ms 640 KB Output is correct
17 Correct 2 ms 640 KB Output is correct
18 Correct 1 ms 640 KB Output is correct
19 Correct 1 ms 640 KB Output is correct
20 Correct 1 ms 640 KB Output is correct
21 Correct 1 ms 640 KB Output is correct
22 Correct 1 ms 640 KB Output is correct
23 Correct 1 ms 640 KB Output is correct
24 Correct 1 ms 640 KB Output is correct
25 Correct 2 ms 640 KB Output is correct
26 Correct 1 ms 640 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 512 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 640 KB Output is correct
15 Correct 2 ms 640 KB Output is correct
16 Correct 1 ms 640 KB Output is correct
17 Correct 2 ms 640 KB Output is correct
18 Correct 1 ms 640 KB Output is correct
19 Correct 1 ms 640 KB Output is correct
20 Correct 1 ms 640 KB Output is correct
21 Correct 1 ms 640 KB Output is correct
22 Correct 1 ms 640 KB Output is correct
23 Correct 1 ms 640 KB Output is correct
24 Correct 1 ms 640 KB Output is correct
25 Correct 2 ms 640 KB Output is correct
26 Correct 1 ms 640 KB Output is correct
27 Correct 154 ms 2040 KB Output is correct
28 Correct 156 ms 2088 KB Output is correct
29 Correct 149 ms 2040 KB Output is correct
30 Correct 152 ms 2040 KB Output is correct
31 Correct 160 ms 2040 KB Output is correct
32 Correct 164 ms 2040 KB Output is correct
33 Correct 149 ms 2040 KB Output is correct
34 Correct 144 ms 2040 KB Output is correct
35 Correct 143 ms 2040 KB Output is correct
36 Correct 148 ms 2040 KB Output is correct
37 Correct 219 ms 2168 KB Output is correct
38 Correct 239 ms 2296 KB Output is correct
39 Correct 202 ms 2300 KB Output is correct

Subtask #4
0 / 71.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3094 ms 9104 KB Time limit exceeded
2 Halted 0 ms 0 KB -