oj.uz

Submission #361982

# Submission time Handle Problem Language Result Execution time Memory
361982 2021-02-01T13:50:33 Z ryansee Stations (IOI20_stations) C++14
0 / 100
 1027 ms 1120 KB 
#include "stations.h"
 
#include "bits/stdc++.h"
using namespace std;
 
#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define f first
#define s second
#define cbr cerr<<"hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ll(x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x,y) (lower_bound(all(x),y)-x.begin())
#define ubd(x,y) (upper_bound(all(x),y)-x.begin())
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
inline long long rand(long long x, long long y) { return rng() % (y+1-x) + x; } //inclusive
string inline to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){ return a==0?llabs(b):gcd(b%a,a); }
 
using ll=long long; 
using ld=long double;
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
using pi=pair<ll,ll>; using spi=pair<ll,pi>; using dpi=pair<pi,pi>; 
 
long long LLINF = 1e18;
int INF = 1e9+1e6;
#define MAXN (200006)
 
vector<int> label(int n, int k, vector<int> U, vector<int> V) {
	vector<vector<int>> v(n, vector<int>());
	FOR(i,0,n-2) v[U[i]].eb(V[i]), v[V[i]].eb(U[i]);
	vector<int> st(n, 0), en(n, 0);
	int co = 0;
	function<void(int,int)>dfs=[&](int x,int p){
		st[x]=co++;
		for(auto i:v[x]) if(i^p) dfs(i, x);
		en[x]=co++;
	};
	dfs(0, 0);
	vector<int> C(n);
	function<void(int,int,int)>dfs2=[&](int x,int p,int co){
		if(co == 0) C[x] = st[x];
		else C[x] = en[x];
		for(auto i:v[x]) if(i^p) dfs2(i, x, !co);
	};
	dfs2(0, 0, 0);
	return C;
}
int find_next_station(int S, int T, vector<int> c) {
	if(S == 0) {
		for(auto i:c) if(i >= T) return i;
		assert(0);
	}
	int pre, post, b;
	if(c[0] < S) { // S is post order
		post = S, pre = c[1] - 1, b = 1;
	} else { // S is pre
		pre = S, post = c[siz(c)-2] + 1, b = 0;
	}
	if(pre <= T && T <= post) { // in subtree
		if(b==0) {
			for(auto i:c) if(i >= T) return i;
			assert(0);
		} else {
			reverse(all(c));
			for(auto i:c) if(i <= T) return i;
			assert(0);
		}
	} else {
		if(b) return c[0];
		else return c.back();
	}
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 492 KB Invalid labels (values out of range). scenario=2, k=1000, vertex=1, label=1990
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 468 KB Invalid labels (values out of range). scenario=0, k=1000, vertex=1, label=1022
2 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# Verdict Execution time Memory Grader output
1 Runtime error 5 ms 1120 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1027 ms 756 KB Output is correct
2 Correct 741 ms 756 KB Output is correct
3 Runtime error 2 ms 1120 KB Execution killed with signal 6
4 Halted 0 ms 0 KB -

Subtask #5
0 / 61.0

# Verdict Execution time Memory Grader output
1 Runtime error 4 ms 1120 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -