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답안 #1035737

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1035737 2024-07-26T14:20:32 Z borisAngelov Construction Project 2 (JOI24_ho_t2) C++17
100 / 100
 169 ms 65844 KB 
#include <bits/stdc++.h>

using namespace std;

const int maxn = 2000005;
const long long inf = (1LL << 61);

int n, m, s, t;
long long L, K;

long long ds[maxn], dt[maxn];
pair<long long, long long> d[maxn];

vector<pair<int, int>> g[maxn];

void dijkstra(int start, long long dist[])
{
    for (int i = 1; i <= n; ++i)
    {
        dist[i] = inf;
    }

    priority_queue<pair<long long, int>> pq;
    pq.push({0, start});
    dist[start] = 0;

    bool visited[n + 1] = {};

    while (!pq.empty())
    {
        auto top = pq.top();
        pq.pop();

        int node = top.second;
        long long curr = -top.first;

        if (visited[node] == true) continue;
        visited[node] = true;

        for (int i = 0; i < g[node].size(); ++i)
        {
            if (dist[g[node][i].first] > curr + g[node][i].second)
            {
                dist[g[node][i].first] = curr + g[node][i].second;
                pq.push({-dist[g[node][i].first], g[node][i].first});
            }
        }
    }
}

void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}

int main()
{
    fastIO();

    cin >> n >> m >> s >> t >> L >> K;

    for (int i = 1; i <= m; ++i)
    {
        int x, y, w;
        cin >> x >> y >> w;

        g[x].push_back({y, w});
        g[y].push_back({x, w});
    }

    dijkstra(s, ds);
    dijkstra(t, dt);

    if (ds[t] <= K)
    {
        cout << ((1LL * n) * (1LL * (n - 1))) / 2 << endl;
        return 0;
    }

    for (int i = 1; i <= n; ++i)
    {
        d[i] = {ds[i], dt[i]};
    }

    sort(d + 1, d + n + 1);

    long long ans = 0;

    for (int i = 2; i <= n; ++i)
    {
        if (d[i].second == inf) continue;

        int l = 1;
        int r = i - 1;

        while (l <= r)
        {
            int mid = (l + r) / 2;

            if (d[i].second + d[mid].first <= K - L)
            {
                l = mid + 1;
            }
            else
            {
                r = mid - 1;
            }
        }

        ans += r;
    }

    cout << ans << endl;

    return 0;
}

Compilation message

Main.cpp: In function 'void dijkstra(int, long long int*)':
Main.cpp:40:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for (int i = 0; i < g[node].size(); ++i)
      |                         ~~^~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 47192 KB Output is correct
2 Correct 20 ms 47196 KB Output is correct
3 Correct 21 ms 47196 KB Output is correct
4 Correct 21 ms 47452 KB Output is correct
5 Correct 21 ms 47452 KB Output is correct
6 Correct 21 ms 47600 KB Output is correct
7 Correct 72 ms 60272 KB Output is correct
8 Correct 84 ms 60176 KB Output is correct
9 Correct 79 ms 60784 KB Output is correct
10 Correct 21 ms 47196 KB Output is correct
11 Correct 21 ms 47452 KB Output is correct
12 Correct 21 ms 47500 KB Output is correct
13 Correct 22 ms 47452 KB Output is correct
14 Correct 61 ms 57944 KB Output is correct
15 Correct 141 ms 60808 KB Output is correct
16 Correct 21 ms 47408 KB Output is correct
17 Correct 21 ms 47452 KB Output is correct
18 Correct 82 ms 59984 KB Output is correct
19 Correct 20 ms 47196 KB Output is correct
20 Correct 20 ms 47452 KB Output is correct
21 Correct 21 ms 47580 KB Output is correct
22 Correct 23 ms 47448 KB Output is correct
23 Correct 58 ms 58040 KB Output is correct
24 Correct 157 ms 60812 KB Output is correct
25 Correct 21 ms 47452 KB Output is correct
26 Correct 21 ms 47708 KB Output is correct
27 Correct 100 ms 65608 KB Output is correct
28 Correct 72 ms 57240 KB Output is correct
29 Correct 77 ms 56912 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 47196 KB Output is correct
2 Correct 22 ms 47196 KB Output is correct
3 Correct 20 ms 47208 KB Output is correct
4 Correct 20 ms 47196 KB Output is correct
5 Correct 21 ms 47452 KB Output is correct
6 Correct 21 ms 47448 KB Output is correct
7 Correct 20 ms 47192 KB Output is correct
8 Correct 21 ms 47448 KB Output is correct
9 Correct 22 ms 47192 KB Output is correct
10 Correct 21 ms 47196 KB Output is correct
11 Correct 20 ms 47452 KB Output is correct
12 Correct 21 ms 47452 KB Output is correct
13 Correct 22 ms 47192 KB Output is correct
14 Correct 20 ms 47440 KB Output is correct
15 Correct 20 ms 47452 KB Output is correct
16 Correct 21 ms 47452 KB Output is correct
17 Correct 20 ms 47452 KB Output is correct
18 Correct 21 ms 47244 KB Output is correct
19 Correct 20 ms 47196 KB Output is correct
20 Correct 25 ms 47424 KB Output is correct
21 Correct 21 ms 47452 KB Output is correct
22 Correct 21 ms 47192 KB Output is correct
23 Correct 20 ms 47452 KB Output is correct
24 Correct 20 ms 47452 KB Output is correct
25 Correct 21 ms 47216 KB Output is correct
26 Correct 21 ms 47452 KB Output is correct
27 Correct 20 ms 47196 KB Output is correct
28 Correct 20 ms 47196 KB Output is correct
29 Correct 21 ms 47192 KB Output is correct
30 Correct 25 ms 47196 KB Output is correct
31 Correct 25 ms 47196 KB Output is correct
32 Correct 20 ms 47452 KB Output is correct

Subtask #3
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 47196 KB Output is correct
2 Correct 22 ms 47196 KB Output is correct
3 Correct 20 ms 47208 KB Output is correct
4 Correct 20 ms 47196 KB Output is correct
5 Correct 21 ms 47452 KB Output is correct
6 Correct 21 ms 47448 KB Output is correct
7 Correct 20 ms 47192 KB Output is correct
8 Correct 21 ms 47448 KB Output is correct
9 Correct 22 ms 47192 KB Output is correct
10 Correct 21 ms 47196 KB Output is correct
11 Correct 20 ms 47452 KB Output is correct
12 Correct 21 ms 47452 KB Output is correct
13 Correct 22 ms 47192 KB Output is correct
14 Correct 20 ms 47440 KB Output is correct
15 Correct 20 ms 47452 KB Output is correct
16 Correct 21 ms 47452 KB Output is correct
17 Correct 20 ms 47452 KB Output is correct
18 Correct 21 ms 47244 KB Output is correct
19 Correct 20 ms 47196 KB Output is correct
20 Correct 25 ms 47424 KB Output is correct
21 Correct 21 ms 47452 KB Output is correct
22 Correct 21 ms 47192 KB Output is correct
23 Correct 20 ms 47452 KB Output is correct
24 Correct 20 ms 47452 KB Output is correct
25 Correct 21 ms 47216 KB Output is correct
26 Correct 21 ms 47452 KB Output is correct
27 Correct 20 ms 47196 KB Output is correct
28 Correct 20 ms 47196 KB Output is correct
29 Correct 21 ms 47192 KB Output is correct
30 Correct 25 ms 47196 KB Output is correct
31 Correct 25 ms 47196 KB Output is correct
32 Correct 20 ms 47452 KB Output is correct
33 Correct 21 ms 47452 KB Output is correct
34 Correct 22 ms 47604 KB Output is correct
35 Correct 21 ms 47448 KB Output is correct
36 Correct 23 ms 47516 KB Output is correct
37 Correct 21 ms 47452 KB Output is correct
38 Correct 21 ms 47452 KB Output is correct
39 Correct 25 ms 47644 KB Output is correct
40 Correct 22 ms 47708 KB Output is correct
41 Correct 22 ms 47444 KB Output is correct
42 Correct 21 ms 47448 KB Output is correct
43 Correct 21 ms 47448 KB Output is correct
44 Correct 22 ms 47452 KB Output is correct
45 Correct 22 ms 47452 KB Output is correct
46 Correct 22 ms 47452 KB Output is correct
47 Correct 22 ms 47452 KB Output is correct
48 Correct 21 ms 47452 KB Output is correct
49 Correct 22 ms 47556 KB Output is correct
50 Correct 21 ms 47456 KB Output is correct
51 Correct 27 ms 47452 KB Output is correct
52 Correct 22 ms 47452 KB Output is correct
53 Correct 22 ms 47708 KB Output is correct
54 Correct 22 ms 47660 KB Output is correct
55 Correct 21 ms 47592 KB Output is correct
56 Correct 20 ms 47604 KB Output is correct
57 Correct 21 ms 47452 KB Output is correct
58 Correct 22 ms 47452 KB Output is correct

Subtask #4
47.0 / 47.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 47192 KB Output is correct
2 Correct 20 ms 47196 KB Output is correct
3 Correct 21 ms 47196 KB Output is correct
4 Correct 21 ms 47452 KB Output is correct
5 Correct 21 ms 47452 KB Output is correct
6 Correct 21 ms 47600 KB Output is correct
7 Correct 72 ms 60272 KB Output is correct
8 Correct 84 ms 60176 KB Output is correct
9 Correct 79 ms 60784 KB Output is correct
10 Correct 21 ms 47196 KB Output is correct
11 Correct 21 ms 47452 KB Output is correct
12 Correct 21 ms 47500 KB Output is correct
13 Correct 22 ms 47452 KB Output is correct
14 Correct 61 ms 57944 KB Output is correct
15 Correct 141 ms 60808 KB Output is correct
16 Correct 21 ms 47408 KB Output is correct
17 Correct 21 ms 47452 KB Output is correct
18 Correct 82 ms 59984 KB Output is correct
19 Correct 20 ms 47196 KB Output is correct
20 Correct 20 ms 47452 KB Output is correct
21 Correct 21 ms 47580 KB Output is correct
22 Correct 23 ms 47448 KB Output is correct
23 Correct 58 ms 58040 KB Output is correct
24 Correct 157 ms 60812 KB Output is correct
25 Correct 21 ms 47452 KB Output is correct
26 Correct 21 ms 47708 KB Output is correct
27 Correct 100 ms 65608 KB Output is correct
28 Correct 72 ms 57240 KB Output is correct
29 Correct 77 ms 56912 KB Output is correct
30 Correct 21 ms 47196 KB Output is correct
31 Correct 22 ms 47196 KB Output is correct
32 Correct 20 ms 47208 KB Output is correct
33 Correct 20 ms 47196 KB Output is correct
34 Correct 21 ms 47452 KB Output is correct
35 Correct 21 ms 47448 KB Output is correct
36 Correct 20 ms 47192 KB Output is correct
37 Correct 21 ms 47448 KB Output is correct
38 Correct 22 ms 47192 KB Output is correct
39 Correct 21 ms 47196 KB Output is correct
40 Correct 20 ms 47452 KB Output is correct
41 Correct 21 ms 47452 KB Output is correct
42 Correct 22 ms 47192 KB Output is correct
43 Correct 20 ms 47440 KB Output is correct
44 Correct 20 ms 47452 KB Output is correct
45 Correct 21 ms 47452 KB Output is correct
46 Correct 20 ms 47452 KB Output is correct
47 Correct 21 ms 47244 KB Output is correct
48 Correct 20 ms 47196 KB Output is correct
49 Correct 25 ms 47424 KB Output is correct
50 Correct 21 ms 47452 KB Output is correct
51 Correct 21 ms 47192 KB Output is correct
52 Correct 20 ms 47452 KB Output is correct
53 Correct 20 ms 47452 KB Output is correct
54 Correct 21 ms 47216 KB Output is correct
55 Correct 21 ms 47452 KB Output is correct
56 Correct 20 ms 47196 KB Output is correct
57 Correct 20 ms 47196 KB Output is correct
58 Correct 21 ms 47192 KB Output is correct
59 Correct 25 ms 47196 KB Output is correct
60 Correct 25 ms 47196 KB Output is correct
61 Correct 20 ms 47452 KB Output is correct
62 Correct 21 ms 47452 KB Output is correct
63 Correct 22 ms 47604 KB Output is correct
64 Correct 21 ms 47448 KB Output is correct
65 Correct 23 ms 47516 KB Output is correct
66 Correct 21 ms 47452 KB Output is correct
67 Correct 21 ms 47452 KB Output is correct
68 Correct 25 ms 47644 KB Output is correct
69 Correct 22 ms 47708 KB Output is correct
70 Correct 22 ms 47444 KB Output is correct
71 Correct 21 ms 47448 KB Output is correct
72 Correct 21 ms 47448 KB Output is correct
73 Correct 22 ms 47452 KB Output is correct
74 Correct 22 ms 47452 KB Output is correct
75 Correct 22 ms 47452 KB Output is correct
76 Correct 22 ms 47452 KB Output is correct
77 Correct 21 ms 47452 KB Output is correct
78 Correct 22 ms 47556 KB Output is correct
79 Correct 21 ms 47456 KB Output is correct
80 Correct 27 ms 47452 KB Output is correct
81 Correct 22 ms 47452 KB Output is correct
82 Correct 22 ms 47708 KB Output is correct
83 Correct 22 ms 47660 KB Output is correct
84 Correct 21 ms 47592 KB Output is correct
85 Correct 20 ms 47604 KB Output is correct
86 Correct 21 ms 47452 KB Output is correct
87 Correct 22 ms 47452 KB Output is correct
88 Correct 103 ms 57976 KB Output is correct
89 Correct 104 ms 58056 KB Output is correct
90 Correct 100 ms 60972 KB Output is correct
91 Correct 55 ms 53148 KB Output is correct
92 Correct 54 ms 53064 KB Output is correct
93 Correct 62 ms 57956 KB Output is correct
94 Correct 65 ms 57908 KB Output is correct
95 Correct 166 ms 60840 KB Output is correct
96 Correct 146 ms 59332 KB Output is correct
97 Correct 149 ms 59984 KB Output is correct
98 Correct 137 ms 59988 KB Output is correct
99 Correct 82 ms 59984 KB Output is correct
100 Correct 79 ms 59988 KB Output is correct
101 Correct 55 ms 53076 KB Output is correct
102 Correct 54 ms 53136 KB Output is correct
103 Correct 60 ms 57972 KB Output is correct
104 Correct 60 ms 57932 KB Output is correct
105 Correct 165 ms 60964 KB Output is correct
106 Correct 155 ms 60912 KB Output is correct
107 Correct 169 ms 65844 KB Output is correct
108 Correct 148 ms 65792 KB Output is correct
109 Correct 83 ms 57188 KB Output is correct
110 Correct 85 ms 61012 KB Output is correct
111 Correct 103 ms 60012 KB Output is correct
112 Correct 100 ms 60052 KB Output is correct