Submission #1045812

#	Time	Username	Problem	Language	Result	Execution time	Memory
1045812		LittleOrange	Toy Train (IOI17_train)	C++17	0 / 100	7 ms	1628 KiB

train

#include "train.h"
#include<bits/stdc++.h>
using namespace std;
using ll = int;
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
	ll n = a.size();
	ll m = u.size();
	std::vector<int> res(a.size());
	for(int i = 0; i < (int)res.size(); i++)
		res[i] = i % 2;
	vector<vector<ll>> con(n),rcon(n);
	for(ll i = 0;i<m;i++){
		con[u[i]].push_back(v[i]);
		rcon[v[i]].push_back(u[i]);
	}
	vector<ll> ans(n,0);
	for(ll i = 0;i<n;i++){
		if (a[i]&&r[i]){
			for(ll j : con[i]) if(j==i) ans[i] = 1;
		}
	}
	for(ll i = n-2;i>=0;i--){
		if (a[i]){
			for(ll j : con[i]) if(j==i+1&&ans[i+1]) ans[i] = 1;
		}else{
			ans[i] = 1;
			for(ll j : con[i]) {
				if(j==i&&!r[i]) ans[i] = 0;
				if(j==i+1&&!ans[i+1]) ans[i] = 0;
			}
		}
	}
	return ans;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51