Submission #637628

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
637628	2022-09-02 13:25:25	4EVER	Putovanje (COCI20_putovanje)	C++11	110 / 110	136 ms	23464 KiB

putovanje

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#include <bits/stdc++.h>
using namespace std;
int n;
vector<pair<int, int>> adj[200001];
int val[200001], cnt[200001], depth[200001], c[200001], d[200001];
int spt[19][200001];
void DFS(int u = 1, int par = -1){
    for(auto x : adj[u]){
        int v = x.first;
        if(v == par) continue;
        depth[v] = depth[u] + 1;
        spt[0][v] = u;
        for(int i = 1; i <= 18; i++) spt[i][v] = spt[i - 1][spt[i - 1][v]];
        DFS(v, u);
    }
}
int LCA(int u, int v){
    if(depth[u] < depth[v]) swap(u, v);
    int k = depth[u] - depth[v];
    for(int i = 18; i >= 0; i--) if((k >> i) & 1) u = spt[i][u];
    if(u == v) return u;
    for(int i = 18; i >= 0; i--) if(spt[i][u] != spt[i][v]){
        u = spt[i][u];
        v = spt[i][v];
    }
    return spt[0][u];
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

putovanje.cpp: In function 'int main()':
putovanje.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
putovanje.cpp:48:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 25 / 25
• Subtask 3: 65 / 65