Submission #577610

#	Time	Username	Problem	Language	Result	Execution time	Memory
577610		Theo830	Toy Train (IOI17_train)	C++17	0 / 100	1317 ms	1056 KiB

train

#include <bits/stdc++.h>
using namespace std;
typedef int ll;
const ll INF = 1e9+7;
const ll MOD = 998244353;
typedef pair<ll,ll> ii;
#define iii pair<ll,ii>
#define ull unsigned int
#define f(i,a,b) for(ll i = a;i < b;i++)
#define pb push_back
#define vll vector<ll>
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
///I hope I will get uprating and don't make mistakes
///I will never stop programming
///sqrt(-1) Love C++
///Please don't hack me
///@TheofanisOrfanou Theo830
///Think different approaches (bs,dp,greedy,graphs,shortest paths,mst)
///Stay Calm
///Look for special cases
///Beware of overflow and array bounds
///Think the problem backwards
///Training
#include "train.h"
bool ok[5005];
vector<vll>adj;
vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
	vector<int> res(a.size());
	ll n = a.size();
	ll m = u.size();
	adj.assign(n+5,vll());
	f(i,0,m){
        adj[u[i]].pb(v[i]);
	}
	f(i,0,n){
        if(r[i] == 1){
            bool v[n+5] = {0};
            queue<ll>q;
            v[i] = 1;
            q.push(i);
            while(!q.empty()){
                ll f = q.front();
                q.pop();
                for(auto x:adj[f]){
                    if(!v[x]){
                        v[x] = 1;
                        q.push(x);
                    }
                    else if(x == i){
                        ok[i] = 1;
                        break;
                    }
                }
            }
        }
	}
	f(i,0,n){
	    res[i] = 0;
        bool v[n+5] = {0};
        queue<ll>q;
        v[i] = 1;
        q.push(i);
        while(!q.empty()){
            ll f = q.front();
            q.pop();
            for(auto x:adj[f]){
                if(!v[x]){
                    v[x] = 1;
                    res[i] |= ok[x];
                    q.push(x);
                }
            }
        }
	}
	return res;
}
/*
int main(){
	int n, m;
	assert(2 == scanf("%d %d", &n, &m));

	vector<int> a(n), r(n), u(m), v(m);

	for(int i = 0; i < n; i++)
		assert(1 == scanf("%d", &a[i]));

	for(int i = 0; i < n; i++)
		assert(1 == scanf("%d", &r[i]));

	for(int i = 0; i < m; i++)
		assert(2 == scanf("%d %d", &u[i], &v[i]));

	vector<int> res = who_wins(a, r, u, v);

	for(int i = 0; i < (int)res.size(); i++)
		printf(i ? " %d" : "%d", res[i]);
	printf("\n");

	return 0;
}
*/

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