Submission #1105417

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1105417	2024-10-26 10:00:29	minhvule	Hotspot (NOI17_hotspot)	C++17	100 / 100	1078 ms	1524 KiB

hotspot

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#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define freo(task) if(fopen(task".inp", "r")){ freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); }
#define FOR(i, a, b) for(int i=(a),_b = (b); i<=_b; i++)
#define FORD(i, a, b) for(int i=(a),_b = (b); i>=_b; i--)
#define pii pair<int, int>
using namespace std;
const int N = 5e3 + 5;
int n, m, k, pa[N], pb[N], da[N], db[N];
vector<int> g[N];
double sum[N];
void dijkstra(int u, int d[], int pa[]) {
    priority_queue<pii, vector<pii>, greater<pii>> pq; // Use a min-heap for Dijkstra
    d[u] = 0;
    pq.push({0, u});
    while (!pq.empty()) {
        pii top = pq.top();
        pq.pop();
        int u = top.second;
        if (top.first > d[u]) continue;
        for (int v : g[u]) {
            if (d[v] > d[u] + 1) {
                d[v] = d[u] + 1;
                pa[v] = pa[u]; // Carry the path count from u
                pq.push({d[v], v});
            } else if (d[v] == d[u] + 1) {
                pa[v] += pa[u]; // Accumulate path counts
 
 
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Compilation message (stderr)

hotspot.cpp: In function 'int32_t main()':
hotspot.cpp:4:55: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define freo(task) if(fopen(task".inp", "r")){ freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); }
      |                                                ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
hotspot.cpp:77:5: note: in expansion of macro 'freo'
   77 |     freo("TRAINCENTRE");
      |     ^~~~
hotspot.cpp:4:88: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    4 | #define freo(task) if(fopen(task".inp", "r")){ freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); }
      |                                                                                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
hotspot.cpp:77:5: note: in expansion of macro 'freo'
   77 |     freo("TRAINCENTRE");
      |     ^~~~

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 11 / 11
• Subtask 4: 18 / 18
• Subtask 5: 26 / 26
• Subtask 6: 36 / 36