oj.uz

Submission #1105378

# Submission time Handle Problem Language Result Execution time Memory
1105378 2024-10-26T08:55:13 Z monaxia Hotspot (NOI17_hotspot) C++17
64 / 100
 370 ms 524288 KB 
// credit: Mai Hong Kien
 
#include <bits/stdc++.h>
#define pb push_back
#define ppb pop_back
#define fr first
#define sc second
#define all(v) v.begin(), v.end()
#define mod (long long)(1e9 + 7)
#define eps (long long)(1e-9)
using namespace std;
 
using ll = long long;
using ull = unsigned long long;
using ld = long double;
ll LIMIT = 2e3 + 5;
 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
ll random (ll l, ll r){return uniform_int_distribution <ll> (l, r)(rng);}
 
 
void solve(){
    ll n, m;
    long double mx = 0, res = 0;
    cin >> n >> m;
 
    vector <vector <ll>> graph(n + 1), dist(n + 1, vector <ll> (n + 1, INT_MAX)), path(n + 1, vector <ll> (m + 1, 0));
    vector <long double> e(n + 1, 0);
    vector <pair <ll, ll>> range;
 
    for(ll i = 1; i <= m; i ++){
        ll u, v;
        cin >> u >> v;
 
        graph[u].pb(v);
        graph[v].pb(u);
    }
 
    for(ll i = 0; i < n; i ++){
        dist[i][i] = 0;
        path[i][i] = 1;
 
        vector <ll> v(n + 1, 0);
        queue <ll> q;
 
        q.push(i);
 
        while(!q.empty()){
            ll s = q.front();
            for(auto& x : graph[s]){
                if(dist[i][x] > dist[i][s] + 1) {
                    dist[i][x] = dist[i][s] + 1;
                    path[i][x] = path[i][s];

                    v[x] = 1;
                    q.push(x);
                } 
 
                else if(dist[i][x] == dist[i][s] + 1) path[i][x] += path[i][s];

                v[x] = 1;
            }
 
            q.pop();
        }
    }
 
    ll k;
    cin >> k;
 
    for(ll i = 1; i <= k; i ++){
        ll u, v;
        cin >> u >> v;
 
        range.pb({u, v});
    }
 
    for(ll i = 0; i < n; i ++){
        for(auto& x : range){
            if(dist[i][x.fr] + dist[i][x.sc] > dist[x.fr][x.sc]) continue;
            else e[i] += ld(path[i][x.fr] * path[i][x.sc]) / ld(path[x.fr][x.sc]);
            // cout << x.fr << " " << x.sc << " " << ld(dist[i][x.fr] * dist[i][x.sc]) / ld(dist[x.fr][x.sc]) << "\n";
        }
 
        if(e[i] > mx) mx = e[i], res = i;
        // cout << e[i] << " ";
        // cout << "\n";
    }
 
    cout << res;
}
 
 
signed main()
{
    // cin.tie(0)->sync_with_stdio(0);
 
    if(fopen("TOY.inp", "r")){
        freopen("TOY.inp", "r", stdin);
        freopen("TOY.out", "w", stdout);
    }
    
    // cout << 1; return 0;
 
    ll n = 1;
 
    // cin >> n;
 
    while(n) {
        solve();
        n --;
        cout << "\n";
    }
 
    // cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
}

Compilation message

hotspot.cpp: In function 'int main()':
hotspot.cpp:99:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |         freopen("TOY.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
hotspot.cpp:100:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |         freopen("TOY.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4688 KB Output is correct
2 Correct 16 ms 10724 KB Output is correct
3 Correct 13 ms 9040 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 3 ms 1872 KB Output is correct
6 Correct 2 ms 1360 KB Output is correct
7 Correct 6 ms 4688 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4688 KB Output is correct
2 Correct 16 ms 10724 KB Output is correct
3 Correct 13 ms 9040 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 3 ms 1872 KB Output is correct
6 Correct 2 ms 1360 KB Output is correct
7 Correct 6 ms 4688 KB Output is correct
8 Correct 2 ms 1360 KB Output is correct
9 Correct 8 ms 5212 KB Output is correct
10 Correct 20 ms 11088 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 3 ms 2128 KB Output is correct
14 Correct 10 ms 6224 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4688 KB Output is correct
2 Correct 16 ms 10724 KB Output is correct
3 Correct 13 ms 9040 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 3 ms 1872 KB Output is correct
6 Correct 2 ms 1360 KB Output is correct
7 Correct 6 ms 4688 KB Output is correct
8 Correct 3 ms 2128 KB Output is correct
9 Correct 9 ms 6480 KB Output is correct
10 Correct 7 ms 5160 KB Output is correct
11 Correct 18 ms 11344 KB Output is correct
12 Correct 1 ms 592 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 4 ms 2128 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4688 KB Output is correct
2 Correct 16 ms 10724 KB Output is correct
3 Correct 13 ms 9040 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 3 ms 1872 KB Output is correct
6 Correct 2 ms 1360 KB Output is correct
7 Correct 6 ms 4688 KB Output is correct
8 Correct 2 ms 1360 KB Output is correct
9 Correct 8 ms 5212 KB Output is correct
10 Correct 20 ms 11088 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 3 ms 2128 KB Output is correct
14 Correct 10 ms 6224 KB Output is correct
15 Correct 3 ms 2128 KB Output is correct
16 Correct 9 ms 6480 KB Output is correct
17 Correct 7 ms 5160 KB Output is correct
18 Correct 18 ms 11344 KB Output is correct
19 Correct 1 ms 592 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 4 ms 2128 KB Output is correct
22 Correct 6 ms 3152 KB Output is correct
23 Correct 4 ms 2384 KB Output is correct
24 Correct 11 ms 6736 KB Output is correct
25 Correct 30 ms 13648 KB Output is correct
26 Correct 24 ms 11856 KB Output is correct
27 Correct 2 ms 592 KB Output is correct
28 Correct 6 ms 3152 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4688 KB Output is correct
2 Correct 16 ms 10724 KB Output is correct
3 Correct 13 ms 9040 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 3 ms 1872 KB Output is correct
6 Correct 2 ms 1360 KB Output is correct
7 Correct 6 ms 4688 KB Output is correct
8 Correct 2 ms 1360 KB Output is correct
9 Correct 8 ms 5212 KB Output is correct
10 Correct 20 ms 11088 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 3 ms 2128 KB Output is correct
14 Correct 10 ms 6224 KB Output is correct
15 Correct 17 ms 8528 KB Output is correct
16 Correct 22 ms 11000 KB Output is correct
17 Correct 77 ms 41032 KB Output is correct
18 Correct 33 ms 15440 KB Output is correct
19 Correct 91 ms 51948 KB Output is correct
20 Correct 16 ms 10576 KB Output is correct
21 Correct 5 ms 2128 KB Output is correct

Subtask #6
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4688 KB Output is correct
2 Correct 16 ms 10724 KB Output is correct
3 Correct 13 ms 9040 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 3 ms 1872 KB Output is correct
6 Correct 2 ms 1360 KB Output is correct
7 Correct 6 ms 4688 KB Output is correct
8 Correct 2 ms 1360 KB Output is correct
9 Correct 8 ms 5212 KB Output is correct
10 Correct 20 ms 11088 KB Output is correct
11 Correct 1 ms 592 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 3 ms 2128 KB Output is correct
14 Correct 10 ms 6224 KB Output is correct
15 Correct 3 ms 2128 KB Output is correct
16 Correct 9 ms 6480 KB Output is correct
17 Correct 7 ms 5160 KB Output is correct
18 Correct 18 ms 11344 KB Output is correct
19 Correct 1 ms 592 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 4 ms 2128 KB Output is correct
22 Correct 6 ms 3152 KB Output is correct
23 Correct 4 ms 2384 KB Output is correct
24 Correct 11 ms 6736 KB Output is correct
25 Correct 30 ms 13648 KB Output is correct
26 Correct 24 ms 11856 KB Output is correct
27 Correct 2 ms 592 KB Output is correct
28 Correct 6 ms 3152 KB Output is correct
29 Correct 17 ms 8528 KB Output is correct
30 Correct 22 ms 11000 KB Output is correct
31 Correct 77 ms 41032 KB Output is correct
32 Correct 33 ms 15440 KB Output is correct
33 Correct 91 ms 51948 KB Output is correct
34 Correct 16 ms 10576 KB Output is correct
35 Correct 5 ms 2128 KB Output is correct
36 Correct 43 ms 22892 KB Output is correct
37 Correct 212 ms 119208 KB Output is correct
38 Runtime error 370 ms 524288 KB Execution killed with signal 9
39 Halted 0 ms 0 KB -