oj.uz

Submission #1112316

# Submission time Handle Problem Language Result Execution time Memory
1112316 2024-11-14T03:57:28 Z luvna Construction Project 2 (JOI24_ho_t2) C++14
100 / 100
 188 ms 29276 KB 
#include<bits/stdc++.h>

#define all(v) v.begin(), v.end()
#define endl "\n"
#define int long long

using namespace std;

typedef long long ll;

const int N = 2e5 + 15;
const ll INF = 1e18;

int n, m, S, T;
ll L, limit;
vector<pair<int,int>> g[N];
vector<ll> distS, distT;

void dijk(vector<ll>& dist, int root){
    dist.resize(N, INF);
    dist[root] = 0;
    priority_queue<pair<ll,int>, vector<pair<ll,int>>, greater<pair<ll,int>>> pq;
    pq.push({0,root});
    while(!pq.empty()){
        ll wu; int u; tie(wu, u) = pq.top(); pq.pop();
        if(wu > dist[u]) continue;
        for(auto [v, wv] : g[u]){
            if(dist[v] > dist[u] + wv){
                dist[v] = dist[u] + wv;
                pq.push({dist[v],v});
            }
        }
    }
}

void solve(){
    cin >> n >> m;

    cin >> S >> T >> L >> limit;

    for(int i = 1; i <= m; i++){
        int u, v, w; cin >> u >> v >> w;
        g[u].push_back({v,w});
        g[v].push_back({u,w});
    }

    dijk(distS, S);
    dijk(distT, T);

    if(distS[T] <= limit){//match whatever
        cout << 1LL*n*(n-1) / 2;
        return;
    }

    ll ans = 0;

    vector<ll> A, B;

    //a + b + L <= limit
    //a <= limit - L - b
    //sort a decrease, sort b increase -> greed

    for(int i = 1; i <= n; i++){
        A.push_back(distS[i]);
        B.push_back(distT[i]);
    }

    sort(all(A)); sort(all(B), greater<ll>());

    for(int i = 0,j = 0; i < B.size(); i++){
        while(j < A.size() && A[j] <= limit - L - B[i]) j++;
        ans += j;
    }

    cout << ans;
}

signed main(){
    ios_base::sync_with_stdio(NULL);
    cin.tie(0); cout.tie(0);

    #define task "task"

    if(fopen(task".INP", "r")){
        freopen(task".INP", "r", stdin);
        freopen(task".OUT", "w", stdout);
    }

    int t; t = 1; //cin >> t;
    while(t--) solve();
}

Compilation message

Main.cpp: In function 'void dijk(std::vector<long long int>&, long long int)':
Main.cpp:27:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   27 |         for(auto [v, wv] : g[u]){
      |                  ^
Main.cpp: In function 'void solve()':
Main.cpp:70:28: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     for(int i = 0,j = 0; i < B.size(); i++){
      |                          ~~^~~~~~~~~~
Main.cpp:71:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |         while(j < A.size() && A[j] <= limit - L - B[i]) j++;
      |               ~~^~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:85:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |         freopen(task".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:86:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |         freopen(task".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8272 KB Output is correct
2 Correct 4 ms 8272 KB Output is correct
3 Correct 4 ms 8272 KB Output is correct
4 Correct 4 ms 8272 KB Output is correct
5 Correct 5 ms 8552 KB Output is correct
6 Correct 4 ms 8272 KB Output is correct
7 Correct 59 ms 22852 KB Output is correct
8 Correct 78 ms 22352 KB Output is correct
9 Correct 68 ms 21340 KB Output is correct
10 Correct 5 ms 8272 KB Output is correct
11 Correct 4 ms 8272 KB Output is correct
12 Correct 5 ms 8336 KB Output is correct
13 Correct 5 ms 8528 KB Output is correct
14 Correct 45 ms 18792 KB Output is correct
15 Correct 149 ms 23980 KB Output is correct
16 Correct 4 ms 8272 KB Output is correct
17 Correct 4 ms 8272 KB Output is correct
18 Correct 77 ms 22800 KB Output is correct
19 Correct 4 ms 8304 KB Output is correct
20 Correct 4 ms 8272 KB Output is correct
21 Correct 5 ms 8272 KB Output is correct
22 Correct 6 ms 8528 KB Output is correct
23 Correct 45 ms 18804 KB Output is correct
24 Correct 139 ms 23980 KB Output is correct
25 Correct 4 ms 8272 KB Output is correct
26 Correct 5 ms 8528 KB Output is correct
27 Correct 81 ms 25656 KB Output is correct
28 Correct 79 ms 20508 KB Output is correct
29 Correct 65 ms 21936 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8272 KB Output is correct
2 Correct 3 ms 8272 KB Output is correct
3 Correct 4 ms 8272 KB Output is correct
4 Correct 4 ms 8272 KB Output is correct
5 Correct 4 ms 8444 KB Output is correct
6 Correct 4 ms 8272 KB Output is correct
7 Correct 3 ms 8272 KB Output is correct
8 Correct 4 ms 8272 KB Output is correct
9 Correct 4 ms 8292 KB Output is correct
10 Correct 5 ms 8272 KB Output is correct
11 Correct 3 ms 8272 KB Output is correct
12 Correct 4 ms 8272 KB Output is correct
13 Correct 4 ms 8272 KB Output is correct
14 Correct 4 ms 8272 KB Output is correct
15 Correct 3 ms 8272 KB Output is correct
16 Correct 4 ms 8272 KB Output is correct
17 Correct 4 ms 8272 KB Output is correct
18 Correct 4 ms 8272 KB Output is correct
19 Correct 4 ms 8284 KB Output is correct
20 Correct 4 ms 8272 KB Output is correct
21 Correct 4 ms 8272 KB Output is correct
22 Correct 4 ms 8272 KB Output is correct
23 Correct 3 ms 8236 KB Output is correct
24 Correct 4 ms 8496 KB Output is correct
25 Correct 4 ms 8272 KB Output is correct
26 Correct 4 ms 8272 KB Output is correct
27 Correct 3 ms 8272 KB Output is correct
28 Correct 4 ms 8252 KB Output is correct
29 Correct 4 ms 8272 KB Output is correct
30 Correct 4 ms 8272 KB Output is correct
31 Correct 3 ms 8272 KB Output is correct
32 Correct 3 ms 8272 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8272 KB Output is correct
2 Correct 3 ms 8272 KB Output is correct
3 Correct 4 ms 8272 KB Output is correct
4 Correct 4 ms 8272 KB Output is correct
5 Correct 4 ms 8444 KB Output is correct
6 Correct 4 ms 8272 KB Output is correct
7 Correct 3 ms 8272 KB Output is correct
8 Correct 4 ms 8272 KB Output is correct
9 Correct 4 ms 8292 KB Output is correct
10 Correct 5 ms 8272 KB Output is correct
11 Correct 3 ms 8272 KB Output is correct
12 Correct 4 ms 8272 KB Output is correct
13 Correct 4 ms 8272 KB Output is correct
14 Correct 4 ms 8272 KB Output is correct
15 Correct 3 ms 8272 KB Output is correct
16 Correct 4 ms 8272 KB Output is correct
17 Correct 4 ms 8272 KB Output is correct
18 Correct 4 ms 8272 KB Output is correct
19 Correct 4 ms 8284 KB Output is correct
20 Correct 4 ms 8272 KB Output is correct
21 Correct 4 ms 8272 KB Output is correct
22 Correct 4 ms 8272 KB Output is correct
23 Correct 3 ms 8236 KB Output is correct
24 Correct 4 ms 8496 KB Output is correct
25 Correct 4 ms 8272 KB Output is correct
26 Correct 4 ms 8272 KB Output is correct
27 Correct 3 ms 8272 KB Output is correct
28 Correct 4 ms 8252 KB Output is correct
29 Correct 4 ms 8272 KB Output is correct
30 Correct 4 ms 8272 KB Output is correct
31 Correct 3 ms 8272 KB Output is correct
32 Correct 3 ms 8272 KB Output is correct
33 Correct 4 ms 8528 KB Output is correct
34 Correct 4 ms 8528 KB Output is correct
35 Correct 6 ms 8272 KB Output is correct
36 Correct 5 ms 8528 KB Output is correct
37 Correct 4 ms 8272 KB Output is correct
38 Correct 4 ms 8284 KB Output is correct
39 Correct 5 ms 8528 KB Output is correct
40 Correct 5 ms 8528 KB Output is correct
41 Correct 4 ms 8344 KB Output is correct
42 Correct 4 ms 8272 KB Output is correct
43 Correct 6 ms 8544 KB Output is correct
44 Correct 5 ms 8528 KB Output is correct
45 Correct 6 ms 8528 KB Output is correct
46 Correct 6 ms 8528 KB Output is correct
47 Correct 6 ms 8528 KB Output is correct
48 Correct 5 ms 8272 KB Output is correct
49 Correct 5 ms 8272 KB Output is correct
50 Correct 4 ms 8244 KB Output is correct
51 Correct 6 ms 8528 KB Output is correct
52 Correct 5 ms 8524 KB Output is correct
53 Correct 7 ms 8528 KB Output is correct
54 Correct 6 ms 8528 KB Output is correct
55 Correct 5 ms 8528 KB Output is correct
56 Correct 5 ms 8288 KB Output is correct
57 Correct 5 ms 8272 KB Output is correct
58 Correct 5 ms 8272 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 8272 KB Output is correct
2 Correct 4 ms 8272 KB Output is correct
3 Correct 4 ms 8272 KB Output is correct
4 Correct 4 ms 8272 KB Output is correct
5 Correct 5 ms 8552 KB Output is correct
6 Correct 4 ms 8272 KB Output is correct
7 Correct 59 ms 22852 KB Output is correct
8 Correct 78 ms 22352 KB Output is correct
9 Correct 68 ms 21340 KB Output is correct
10 Correct 5 ms 8272 KB Output is correct
11 Correct 4 ms 8272 KB Output is correct
12 Correct 5 ms 8336 KB Output is correct
13 Correct 5 ms 8528 KB Output is correct
14 Correct 45 ms 18792 KB Output is correct
15 Correct 149 ms 23980 KB Output is correct
16 Correct 4 ms 8272 KB Output is correct
17 Correct 4 ms 8272 KB Output is correct
18 Correct 77 ms 22800 KB Output is correct
19 Correct 4 ms 8304 KB Output is correct
20 Correct 4 ms 8272 KB Output is correct
21 Correct 5 ms 8272 KB Output is correct
22 Correct 6 ms 8528 KB Output is correct
23 Correct 45 ms 18804 KB Output is correct
24 Correct 139 ms 23980 KB Output is correct
25 Correct 4 ms 8272 KB Output is correct
26 Correct 5 ms 8528 KB Output is correct
27 Correct 81 ms 25656 KB Output is correct
28 Correct 79 ms 20508 KB Output is correct
29 Correct 65 ms 21936 KB Output is correct
30 Correct 4 ms 8272 KB Output is correct
31 Correct 3 ms 8272 KB Output is correct
32 Correct 4 ms 8272 KB Output is correct
33 Correct 4 ms 8272 KB Output is correct
34 Correct 4 ms 8444 KB Output is correct
35 Correct 4 ms 8272 KB Output is correct
36 Correct 3 ms 8272 KB Output is correct
37 Correct 4 ms 8272 KB Output is correct
38 Correct 4 ms 8292 KB Output is correct
39 Correct 5 ms 8272 KB Output is correct
40 Correct 3 ms 8272 KB Output is correct
41 Correct 4 ms 8272 KB Output is correct
42 Correct 4 ms 8272 KB Output is correct
43 Correct 4 ms 8272 KB Output is correct
44 Correct 3 ms 8272 KB Output is correct
45 Correct 4 ms 8272 KB Output is correct
46 Correct 4 ms 8272 KB Output is correct
47 Correct 4 ms 8272 KB Output is correct
48 Correct 4 ms 8284 KB Output is correct
49 Correct 4 ms 8272 KB Output is correct
50 Correct 4 ms 8272 KB Output is correct
51 Correct 4 ms 8272 KB Output is correct
52 Correct 3 ms 8236 KB Output is correct
53 Correct 4 ms 8496 KB Output is correct
54 Correct 4 ms 8272 KB Output is correct
55 Correct 4 ms 8272 KB Output is correct
56 Correct 3 ms 8272 KB Output is correct
57 Correct 4 ms 8252 KB Output is correct
58 Correct 4 ms 8272 KB Output is correct
59 Correct 4 ms 8272 KB Output is correct
60 Correct 3 ms 8272 KB Output is correct
61 Correct 3 ms 8272 KB Output is correct
62 Correct 4 ms 8528 KB Output is correct
63 Correct 4 ms 8528 KB Output is correct
64 Correct 6 ms 8272 KB Output is correct
65 Correct 5 ms 8528 KB Output is correct
66 Correct 4 ms 8272 KB Output is correct
67 Correct 4 ms 8284 KB Output is correct
68 Correct 5 ms 8528 KB Output is correct
69 Correct 5 ms 8528 KB Output is correct
70 Correct 4 ms 8344 KB Output is correct
71 Correct 4 ms 8272 KB Output is correct
72 Correct 6 ms 8544 KB Output is correct
73 Correct 5 ms 8528 KB Output is correct
74 Correct 6 ms 8528 KB Output is correct
75 Correct 6 ms 8528 KB Output is correct
76 Correct 6 ms 8528 KB Output is correct
77 Correct 5 ms 8272 KB Output is correct
78 Correct 5 ms 8272 KB Output is correct
79 Correct 4 ms 8244 KB Output is correct
80 Correct 6 ms 8528 KB Output is correct
81 Correct 5 ms 8524 KB Output is correct
82 Correct 7 ms 8528 KB Output is correct
83 Correct 6 ms 8528 KB Output is correct
84 Correct 5 ms 8528 KB Output is correct
85 Correct 5 ms 8288 KB Output is correct
86 Correct 5 ms 8272 KB Output is correct
87 Correct 5 ms 8272 KB Output is correct
88 Correct 101 ms 19116 KB Output is correct
89 Correct 120 ms 21340 KB Output is correct
90 Correct 117 ms 26900 KB Output is correct
91 Correct 45 ms 18772 KB Output is correct
92 Correct 46 ms 19072 KB Output is correct
93 Correct 47 ms 18884 KB Output is correct
94 Correct 57 ms 18784 KB Output is correct
95 Correct 184 ms 24196 KB Output is correct
96 Correct 136 ms 20156 KB Output is correct
97 Correct 156 ms 26424 KB Output is correct
98 Correct 133 ms 23984 KB Output is correct
99 Correct 74 ms 22960 KB Output is correct
100 Correct 79 ms 25840 KB Output is correct
101 Correct 49 ms 20552 KB Output is correct
102 Correct 52 ms 20816 KB Output is correct
103 Correct 59 ms 19960 KB Output is correct
104 Correct 55 ms 19232 KB Output is correct
105 Correct 188 ms 26412 KB Output is correct
106 Correct 157 ms 24872 KB Output is correct
107 Correct 163 ms 26512 KB Output is correct
108 Correct 183 ms 29276 KB Output is correct
109 Correct 82 ms 22848 KB Output is correct
110 Correct 86 ms 22764 KB Output is correct
111 Correct 101 ms 24216 KB Output is correct
112 Correct 102 ms 24700 KB Output is correct