Submission #1054795

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054795		Wansur	Toy Train (IOI17_train)	C++17	23 / 100	207 ms	1736 KiB

train

#include <bits/stdc++.h>
#include "train.h"
#define ent '\n'
#define  f first
#define s second
//#define int long long

using namespace std;
typedef long long ll;
const int maxn = 5e3 + 12;
const int mod = 1e9 + 7;

vector<int> g[maxn], rg[maxn];
int in[maxn], out[maxn];
bool won[maxn];
int n, m;

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> U, vector<int> V){
    n = a.size(), m = U.size();
    vector<int> ans(n);

    for(int i=0;i<m;i++){
        g[U[i]].push_back(V[i]);
        rg[V[i]].push_back(U[i]);
    }

    for(int v=0;v<n;v++){
        if(r[v] == 0){
            continue;
        }
        for(int i=0;i<n;i++){
            out[i] = g[i].size();
            won[i] = 0;
        }
        won[v] = 1;

        queue<int> q;
        q.push(v);
        while(q.size()){
            int v = q.front();
            q.pop();
            for(int to:rg[v]){
                if(a[to] && !won[to]){
                    won[to] = 1;
                    q.push(to);
                }
                if(!a[to]){
                    out[to]--;
                    if(out[to] == 0){
                        won[to] = 1;
                        q.push(to);
                    }
                }
            }
        }

        bool ok = 0;

        for(int to:g[v]){
            if(won[to]){
                ok = 1;
            }
        }
        if(ok){
            for(int i=0;i<n;i++){
                if(won[i]){
                    ans[i] = 1;
                }
            }
        }
    }
    return ans;
}

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