Submission #357765

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
357765	2021-01-24 16:13:00	parsabahrami	Railway (BOI17_railway)	C++17	100 / 100	166 ms	28012 KiB

railway

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// Call my Name and Save me from The Dark
#include <bits/stdc++.h>
 
using namespace std;
typedef long long int ll;
typedef pair<int, int> pii;
 
#define SZ(x)                       (int) x.size()
#define F                           first
#define S                           second
const int N = 1e5 + 10;
int tim, n, m, k, St[N], Ft[N], P[19][N], H[N], from[N], to[N], ps[N]; vector<int> adj[N], R;
void preDFS(int v, int p = -1) {
    if (!~p) P[0][v] = v;
    St[v] = tim++;
    for (int i = 1; i < 19; i++) P[i][v] = P[i - 1][P[i - 1][v]];
    for (int id : adj[v]) {
        int u = from[id] ^ to[id] ^ v;
        if (u != p) {
            H[u] = H[v] + 1;
            P[0][u] = v; 
            preDFS(u, v);
        }
    }
    Ft[v] = tim;
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

railway.cpp: In function 'int main()':
railway.cpp:56:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   56 |     scanf("%d%d%d", &n, &m, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
railway.cpp:58:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   58 |         scanf("%d%d", &from[i], &to[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
railway.cpp:65:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   65 |         for (scanf("%d", &l); l; l--) {
      |              ~~~~~^~~~~~~~~~
railway.cpp:66:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   66 |             int v; scanf("%d", &v); vec.push_back(v);
      |                    ~~~~~^~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 15 / 15
• Subtask 3: 7 / 7
• Subtask 4: 29 / 29
• Subtask 5: 16 / 16
• Subtask 6: 25 / 25