Submission #397881

#	Time	Username	Problem	Language	Result	Execution time	Memory
397881		cfalas	Stations (IOI20_stations)	C++14	0 / 100	2 ms	328 KiB

stations

#include "stations.h"
#include<bits/stdc++.h>
using namespace std;
#define mp make_pair
#define INF 10000000
#define MOD 1000000007
#define MID ((l+r)/2)
#define HASHMOD 2305843009213693951
#define ll long long
#define ull unsigned long long
#define F first
#define S second
typedef pair<ll, ll> ii;
typedef pair<ii, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef map<int, int> mii;

#define EPS 1e-6
#define FOR(i,n) for(int i=0;i<((int)(n));i++)
#define FORi(i,a,b) for(int i=((int)(a));i<((int)(b));i++)
#define FOA(v, a) for(auto v : a)

vector<vi> adj;
vi labels;
int cnt=0;
vi sub;
void dfs(int s, int p=-1){
	labels[s] = cnt++;
	for(auto v : adj[s]) if(v!=p) dfs(v, s), sub[s]+=sub[v];
}

vi label(int n, int k, std::vector<int> u, std::vector<int> v) {
	cnt = 0;
	adj.assign(n, vi());
	sub.assign(n, 1);
	labels.assign(n, 0);
	FOR(i,n-1){
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	dfs(0);
	FOR(i,n) cout<<labels[i]<<" "<<sub[i]<<endl;
	FOR(i,n) labels[i] = labels[i]*1000 + sub[i];

	//FOA(v, labels) cout<<v<<" "; cout<<endl;

	return labels;
}

int get_s(int x){ return x % 1000; }

int find_next_station(int s, int t, std::vector<int> c) {
	//cout<<s<<" "<<t<<endl;
	int lt = t/1000;
	int ls = s/1000;

	int prev = ls;
	sort(c.begin(), c.end());
	FOA(x, c){
		if((x/1000)<ls) continue;
		int xs = get_s(x);
		if(prev<lt && lt<=prev+xs) return x;
		prev+=xs;
	}
	//cout<<s<<" "<<get_s(s)<<endl;
	return *min_element(c.begin(), c.end());

}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61