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 FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr)
#define FOR(i, begin, end) for(int i = (begin); i < (end); i++)
#define TSTS int ttt; cin >> ttt; while(ttt--) solve()
#define all(x) (x).begin(), (x).end()
#define le(vec) vec[vec.size()-1]
#define sz(x) ((int)((x).size()))
#define pb push_back
#define s second
#define f first
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef map<int, int> mii;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef pair<long double, long double> pdd;
const int INF=1e9, MOD=1e9+7, mod=998244353;
const ll LINF=1e18;
void setIO()
{
FAST_IO;
}
void setIO(string s)
{
FAST_IO;
freopen((s+".in").c_str(), "r", stdin);
freopen((s+".out").c_str(), "w", stdout);
}
const int N=1e3+10;
int dp[N], lb[N], lst;
bool v[N];
vi ad[N];
void build(int u, int pst)
{
for(auto x : ad[u]){
if(x==pst) continue;
build(x, u);
dp[u]+=dp[x];
}
dp[u]++;
}
void dfs(int u, int pst, bool mx)
{
if(mx){
while(v[lst]) lst--;
lb[u]=lst;
v[lst]=true;
}
for(auto x : ad[u]){
if(x==pst) continue;
if(mx){
int now=lb[u];
while(v[now]) now--;
lb[x]=now-dp[x]+1;
assert(!v[lb[x]]);
v[lb[x]]=true;
}
dfs(x, u, !mx);
}
}
vi label(int n, int k, vi uu, vi vv)
{
FOR(i, 0, n+1) ad[i].clear(), v[i]=false, dp[i]=0, lb[i]=0;
FOR(i, 0, n-1)
{
ad[uu[i]].pb(vv[i]);
ad[vv[i]].pb(uu[i]);
}
lst=n;
build(0, -1);
dfs(0, -1, true);
vi ans;
FOR(i, 0, n) ans.pb(lb[i]);
return ans;
}
int find_next_station(int s, int t, vi c)
{
for(auto x : c){
if(x==t){
return t;
}
}
if(s<c[0]){
if(t<s){
return le(c);
}
FOR(i, 0, sz(c)-1)
{
if(c[i]>t){
return c[i];
}
}
return le(c);
}
else{
if(t>s){
return c[0];
}
for(int i=sz(c)-1; i>0; i--){
if(c[i]<t){
return c[i];
}
}
return c[0];
}
}
/*int main()
{
setIO();
/*int nn, kk; cin >> nn >> kk;
vi ar(nn-1), br(nn-1);
FOR(i, 0, nn-1)
{
cin >> ar[i] >> br[i];
}
for(auto x : label(nn, kk, ar, br)){
cout << x << '\n';
}*/
//cout << find_next_station(3, 4, {1,2});
//}
Compilation message (stderr)
stations.cpp:123:5: warning: "/*" within comment [-Wcomment]
123 | /*int nn, kk; cin >> nn >> kk;
|
stations.cpp: In function 'void setIO(std::string)':
stations.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
32 | freopen((s+".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stations.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
33 | freopen((s+".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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