Submission #757633

#	Time	Username	Problem	Language	Result	Execution time	Memory
757633		Rafi22	Toy Train (IOI17_train)	C++14	0 / 100	21 ms	1748 KiB

train

#include <bits/stdc++.h>

using namespace std;

#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define sz(x) (int)(x).size()
#define all(x) (x).begin(), (x).end()
#define ll long long
ll mod=1000000007;
int inf=1000000007;
ll infl=1000000000000000007;

const int N=5007;

int a[N],r[N];
vector<int>G[N];
vector<int>RG[N];
int ile[N];
bool is[N];

vector<int> who_wins(vector<int>a,vector<int>r,vector<int>U,vector<int>V)
{
    int n=sz(a),m=sz(U);
    vector<int>ans(n,1);
    for(int i=0;i<m;i++)
    {
        G[U[i]].pb(V[i]);
        RG[V[i]].pb(U[i]);
    }
    while(true)
    {
        memset(ile,0,sizeof ile);
        deque<int>Q;
        for(int i=0;i<n;i++) if(r[i]) Q.pb(i);
        while(sz(Q)>0)
        {
            int v=Q[0];
            Q.pop_front();
            for(auto u:RG[v])
            {
                if(is[u]) continue;
                ile[u]++;
                if(a[u]==1||ile[u]==sz(G[u]))
                {
                    is[u]=1;
                    Q.pb(u);
                }
            }
        }
        bool xd=0;
        for(int i=0;i<n;i++) if(!is[i]) ans[i]=0;
        for(int i=0;i<n;i++)
        {
            if(!r[i]) continue;
            int c=0;
            for(auto u:G[i]) if(is[u]) c++;
            if(c==0||(a[i]==0&&c!=sz(G[i])))
            {
                r[i]=0;
                xd=1;
                break;
            }
        }
        if(!xd) break;
    }
    return ans;
}
/*
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    vector<int>x=who_wins({0, 1},{1, 0},{0, 0, 1, 1},{0, 1, 0, 1});
    for(auto a:x) cout<<a<<" ";

    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