oj.uz

Submission #391823

# Submission time Handle Problem Language Result Execution time Memory
391823 2021-04-20T03:21:29 Z syl123456 007 (CEOI14_007) C++17
44 / 100
 267 ms 18296 KB 
#include <bits/stdc++.h>
#define all(i) (i).begin(), (i).end()
#define debug(x) cerr << "Line(" << __LINE__ << ") -> " << #x << " is " << x << endl
using namespace std;
template<typename T1, typename T2>
ostream& operator << (ostream &i, pair<T1, T2> j) {
    return i << j.first << ' ' << j.second;
}
template<typename T>
ostream& operator << (ostream &i, vector<T> j) {
    i << '{' << j.size() << ':';
    for (T ii : j) i << ' ' << ii;
    return i << '}';
}
typedef long long ll;
typedef pair<int, int> pi;
int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n, m, s, d, a, b;
    cin >> n >> m >> s >> d >> a >> b;
    --s, --d, --a, --b;
    vector<int> g[n];
    for (int i = 0; i < m; ++i) {
        int x, y;
        cin >> x >> y;
        --x, --y;
        g[x].push_back(y), g[y].push_back(x);
    }
    vector<int> disd(n, -1), diss(n, -1), disa(n, -1), disb(n, -1);
    queue<int> q;
    disd[d] = 0, q.push(d);
    while (!q.empty()) {
        int i = q.front();
        q.pop();
        for (int j : g[i]) if (disd[j] == -1)
                disd[j] = disd[i] + 1, q.push(j);
    }
    diss[s] = 0, q.push(s);
    while (!q.empty()) {
        int i = q.front();
        q.pop();
        for (int j : g[i]) if (diss[j] == -1)
                diss[j] = diss[i] + 1, q.push(j);
    }
    if (disd[a] != disd[b]) {
        if (disd[a] < disd[b]) cout << max(disd[a] - diss[a], -1);
        else cout << max(disd[b] - diss[b], -1);
    }
    else {
        int tmp = max(disd[a] - 1 - diss[a], disd[b] - 1 - diss[b]);
        vector<int> disa(n, -1), disb(n, -1);
        disa[a] = 0, q.push(a);
        while (!q.empty()) {
            int i = q.front();
            q.pop();
            for (int j : g[i]) if (disa[j] == -1)
                disa[j] = disa[i] + 1, q.push(j);
        }
        disb[b] = 0, q.push(b);
        while (!q.empty()) {
            int i = q.front();
            q.pop();
            for (int j : g[i]) if (disb[j] == -1)
                disb[j] = disb[i] + 1, q.push(j);
        }
        int x = d;
        for (int i = 0; i < n; ++i)
            if (disa[i] == disb[i] && disd[i] + disa[i] == disd[a] && disa[i] < disa[x])
                x = i;
        for (int i = 0; i < n; ++i) if (disa[i] <= disa[x] && disb[i] <= disb[x])
            tmp = max(tmp, disd[x] - diss[i]);
        cout << max(tmp, -1);
    }
}

Subtask #1
23.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 224 KB Output is correct
3 Correct 1 ms 208 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 208 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 216 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Partially correct 1 ms 344 KB Partially correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct

Subtask #2
21.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 3472 KB Output is correct
2 Correct 33 ms 4872 KB Output is correct
3 Correct 31 ms 3656 KB Output is correct
4 Correct 36 ms 5044 KB Output is correct
5 Correct 27 ms 2980 KB Output is correct
6 Correct 29 ms 3372 KB Output is correct
7 Partially correct 37 ms 4040 KB Partially correct
8 Partially correct 27 ms 4148 KB Partially correct
9 Correct 38 ms 4552 KB Output is correct
10 Correct 142 ms 9332 KB Output is correct
11 Correct 56 ms 7368 KB Output is correct
12 Correct 85 ms 9176 KB Output is correct
13 Correct 77 ms 7888 KB Output is correct
14 Correct 51 ms 6892 KB Output is correct
15 Correct 73 ms 9356 KB Output is correct
16 Correct 62 ms 8912 KB Output is correct
17 Partially correct 67 ms 8768 KB Partially correct
18 Correct 77 ms 8808 KB Output is correct
19 Correct 111 ms 10032 KB Output is correct
20 Correct 201 ms 13000 KB Output is correct
21 Correct 111 ms 12868 KB Output is correct
22 Correct 106 ms 11128 KB Output is correct
23 Correct 91 ms 11532 KB Output is correct
24 Correct 105 ms 12624 KB Output is correct
25 Correct 110 ms 11880 KB Output is correct
26 Correct 75 ms 10172 KB Output is correct
27 Partially correct 124 ms 12952 KB Partially correct
28 Partially correct 142 ms 12880 KB Partially correct
29 Correct 142 ms 12560 KB Output is correct
30 Correct 216 ms 14228 KB Output is correct
31 Correct 157 ms 14840 KB Output is correct
32 Correct 136 ms 12612 KB Output is correct
33 Correct 94 ms 11776 KB Output is correct
34 Correct 145 ms 13752 KB Output is correct
35 Correct 147 ms 13272 KB Output is correct
36 Correct 131 ms 13704 KB Output is correct
37 Correct 122 ms 13928 KB Output is correct
38 Partially correct 154 ms 15080 KB Partially correct
39 Partially correct 186 ms 15100 KB Partially correct
40 Correct 227 ms 16456 KB Output is correct
41 Correct 267 ms 18296 KB Output is correct