# | TimeUTC-0 | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
360186 | iamsleepy | Cat in a tree (BOI17_catinatree) | C++14 | 1060 ms | 21224 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
using namespace std;
const int mxn=2e5+5;
const int inf=1e9;
int d;
int level[mxn];
set<pii> st;
vector<int> adj[mxn];
void dfs(int cur,int prev,int dist) {
if(dist >= d) return;
if(st.find({level[cur],cur}) != st.end()) st.erase({level[cur],cur});
for(int u : adj[cur]) {
if(u == prev) continue;
dfs(u,cur,dist + 1);
}
}
void DFS(int cur,int prev) {
level[cur] = level[prev] + 1;
for(int u : adj[cur]) {
if(u != prev) DFS(u,cur);
}
}
int main() {
int n;
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