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Submission #1065048

# Submission time Handle Problem Language Result Execution time Memory
1065048 2024-08-18T21:40:06 Z beaconmc The Ties That Guide Us (CEOI23_incursion) C++17
30 / 100
 230 ms 14932 KB 
#include "incursion.h"

#include <bits/stdc++.h>
 
typedef int ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
 
using namespace std;



ll sub[50000];
vector<ll> edges[50000];
ll par[50000];
ll visited[50000];
ll depth[50000];
ll unsure[50000];
ll n;



void dfs(ll a, ll p, ll d){
    depth[a] = d;
    par[a] = p;
    sub[a] = 1;
    for (auto&i : edges[a]){
        if (i != p) dfs(i,a,d+1), sub[a] += sub[i];
    }
}

ll centfind(ll a, ll p){
    for (auto&i : edges[a]){
        if (i!=p && sub[i] > n/2) return centfind(i, a);
    }
    return a;
}





vector<int> mark(std::vector<std::pair<int, int>> F, int safe) {
    n = (ll)F.size()+1;
    vector<int> ties(n);
    FOR(i,0,50000) edges[i].clear(), sub[i] = 0, par[i] = -1, depth[i] = 0;

    for (auto&i : F){
        edges[i.first].push_back(i.second);
        edges[i.second].push_back(i.first);
    }
    dfs(1, -1, 0);

    ll cent = centfind(1, -1);

    dfs(cent, -1, 0);


    while (safe != -1){
        ties[safe-1] = 1;
        safe = par[safe];
    }

    return ties;


}

bool cmp(ll a, ll b){
    return sub[a] < sub[b];
}

void locate(std::vector<std::pair<int, int>> F, int curr, int t) {
    n = (ll)F.size()+1;

    FOR(i,0,50000) edges[i].clear(), sub[i] = 0, par[i] = -1, depth[i] = 0;

    for (auto&i : F){
        edges[i.first].push_back(i.second);
        edges[i.second].push_back(i.first);
    }
    dfs(1, -1, 0);

    ll cent = centfind(1, -1);

    dfs(cent, -1, 0);
    visited[curr] = 1;

    //cout << cent << endl;

    while (t != 1 && curr != cent){
        t = visit(par[curr]);
        curr = par[curr];
        visited[curr] = 1;
    }

    while (1){
        visited[curr] = 1;
        if (t==0 && curr!=cent){
            t = visit(par[curr]);
            curr = par[curr];
            continue;
        }
        sort(edges[curr].begin(), edges[curr].end(), cmp);
        reverse(edges[curr].begin(), edges[curr].end());
        bool done = false;
        for (auto&i : edges[curr]){
            if (i==par[curr]) continue;
            if (!visited[i]){
                visited[i] = true;
                t = visit(i);
                curr = i;
                done = true;
                break;
            }
        }
        if (!done){
            return;
        }


    }



}

Compilation message

interface.cpp: In function 'int main()':
interface.cpp:44:55: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   44 |     if(fread(T.data(), sizeof(int), 2 * N - 2, stdin) != 2 * N - 2) exit(0);
      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
interface.cpp:50:33: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   50 |         int l = (numbers.size() == N ? N : 0);
      |                  ~~~~~~~~~~~~~~~^~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4356 KB Correct

Subtask #1
0.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 230 ms 13312 KB Correct
2 Correct 229 ms 13508 KB Correct
3 Correct 110 ms 14076 KB Correct
4 Correct 100 ms 14932 KB Correct
5 Incorrect 118 ms 14760 KB Not correct
6 Halted 0 ms 0 KB -

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 87 ms 8616 KB Correct
2 Correct 79 ms 8940 KB Correct
3 Correct 80 ms 8860 KB Correct
4 Correct 90 ms 11940 KB Correct
5 Correct 139 ms 11408 KB Correct
6 Correct 176 ms 11368 KB Correct
7 Correct 79 ms 8868 KB Correct
8 Correct 83 ms 8520 KB Correct
9 Correct 84 ms 8684 KB Correct
10 Correct 83 ms 8552 KB Correct
11 Correct 79 ms 8600 KB Correct
12 Correct 82 ms 8684 KB Correct
13 Correct 76 ms 8348 KB Correct
14 Correct 52 ms 7336 KB Correct
15 Correct 55 ms 7328 KB Correct
16 Correct 76 ms 8352 KB Correct
17 Correct 71 ms 8696 KB Correct
18 Correct 74 ms 8364 KB Correct
19 Correct 82 ms 8428 KB Correct
20 Correct 56 ms 7332 KB Correct
21 Correct 55 ms 7584 KB Correct
22 Correct 54 ms 7304 KB Correct
23 Correct 55 ms 7324 KB Correct
24 Correct 59 ms 7316 KB Correct
25 Correct 63 ms 7324 KB Correct
26 Correct 82 ms 8936 KB Correct
27 Correct 77 ms 8860 KB Correct
28 Correct 82 ms 8708 KB Correct
29 Correct 78 ms 8604 KB Correct
30 Correct 76 ms 8956 KB Correct
31 Correct 78 ms 8524 KB Correct
32 Correct 80 ms 8960 KB Correct
33 Correct 76 ms 8428 KB Correct
34 Correct 80 ms 8448 KB Correct
35 Correct 75 ms 8744 KB Correct
36 Correct 79 ms 8864 KB Correct
37 Correct 73 ms 8688 KB Correct
38 Correct 75 ms 8712 KB Correct
39 Correct 83 ms 8704 KB Correct
40 Correct 79 ms 8700 KB Correct
41 Correct 63 ms 8704 KB Correct
42 Correct 78 ms 8892 KB Correct
43 Correct 82 ms 8948 KB Correct
44 Correct 78 ms 8944 KB Correct
45 Correct 77 ms 8860 KB Correct
46 Correct 82 ms 8952 KB Correct
47 Correct 89 ms 8940 KB Correct
48 Correct 81 ms 8720 KB Correct
49 Correct 79 ms 8612 KB Correct
50 Correct 83 ms 8704 KB Correct
51 Correct 68 ms 8744 KB Correct
52 Correct 75 ms 8860 KB Correct
53 Correct 77 ms 8528 KB Correct
54 Correct 78 ms 8868 KB Correct
55 Correct 79 ms 8692 KB Correct
56 Correct 74 ms 8864 KB Correct
57 Correct 82 ms 8884 KB Correct
58 Correct 86 ms 8860 KB Correct
59 Correct 79 ms 8812 KB Correct
60 Correct 86 ms 8784 KB Correct
61 Correct 84 ms 8768 KB Correct
62 Correct 82 ms 8784 KB Correct
63 Correct 78 ms 9064 KB Correct
64 Correct 77 ms 8932 KB Correct
65 Correct 79 ms 8952 KB Correct

Subtask #3
0.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4356 KB Correct
2 Correct 230 ms 13312 KB Correct
3 Correct 229 ms 13508 KB Correct
4 Correct 110 ms 14076 KB Correct
5 Correct 100 ms 14932 KB Correct
6 Incorrect 118 ms 14760 KB Not correct
7 Halted 0 ms 0 KB -