Submission #674349

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
674349	2022-12-23 18:23:36	Ahmed57	Sightseeing (NOI14_sightseeing)	C++14	15 / 25	2931 ms	135888 KiB

sightseeing

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//LCA
#include <bits/stdc++.h>
using namespace std;
const int N=1e5+5;
vector<pair<int,int>> adj[N];
long long P[N][18],mi[N][18];
long long hi[N];
int n,m,q;
void dfs(int node,int pa,int ed){
    P[node][0]=pa;
    hi[node]=hi[pa]+1;
    mi[node][0] = ed;
    for(int k=1;k<=17;k++){
        P[node][k]=P[P[node][k-1]][k-1];
        mi[node][k] = min(mi[node][k-1],mi[P[node][k-1]][k-1]);
    }
    for(auto i:adj[node]){
        if(i.first==pa) continue;
        dfs(i.first,node,i.second);
    }
}
long long lca(int x,int y)
{
    long long mii = 1e18;
    if(hi[x]<hi[y]) swap(x,y);
 
 
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Compilation message (stderr)

sightseeing.cpp: In function 'int main()':
sightseeing.cpp:78:33: warning: iteration 100001 invokes undefined behavior [-Waggressive-loop-optimizations]
   78 |     for(int i = 0;i<N;i++)pr[i] = i , gs[i] = 1;
      |                           ~~~~~~^~~
sightseeing.cpp:78:20: note: within this loop
   78 |     for(int i = 0;i<N;i++)pr[i] = i , gs[i] = 1;
      |                   ~^~

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 6 / 6
• Subtask 4: 0 / 10