Submission #390841

#	Time	Username	Problem	Language	Result	Execution time	Memory
390841		acm	Sleepy game (innopolis2018_final_D)	C++14	100 / 100	67 ms	19396 KiB

D

#include <bits/stdc++.h>
#define speed                   \
  ios_base::sync_with_stdio(0); \
  cin.tie(0);                   \
  cout.tie(0);
#define precision     \
  cout.precision(30); \
  cerr.precision(10);
#define ll long long
#define ld long double
#define pll pair<ll, ll>
#define pii pair<int, int>
#define forn(n) for (int i = 1; i <= n; i++)
#define forlr(l, r) for (int i = l; i != r; (l > r ? i-- : i++))
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define mp(x, y) make_pair(x, y)
#define all(x) x.begin(), x.end()
#define pc(x) __builtin_popcount(x)
#define pcll(x) __builtin_popcountll(x)
#define F first
#define S second
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
void ioi(string name) {
  freopen((name + ".in").c_str(), "r", stdin);
  freopen((name + ".out").c_str(), "w", stdout);
}
int n, m, c, r, t[200005], w[200005][2];
vector<int> g[200005];
void dfs(int v = r, int k = 0, int p = -1) {
  w[v][k] = p;
  for (auto to : g[v]) {
    if (!w[to][!k]) dfs(to, !k, v);
  }
}
void sfd(int v = r) {
  t[v] = 1;
  for (auto to : g[v]) {
    if (!t[to])
      sfd(to);
    else if (t[to] == 1)
      c = 1;
  }
  t[v] = 2;
}
int main() {
  speed;
  precision;
  // code
  cin >> n >> m;
  for (int i = 1; i <= n; i++) {
    int x;
    cin >> x;
    while (x--) {
      int v;
      cin >> v;
      g[i].pb(v);
    }
  }
  cin >> r;
  dfs();
  for (int i = 1; i <= n; i++) {
    if (!sz(g[i]) && w[i][1]) {
      cout << "Win\n";
      vector<int> e;
      int v = i, k = 1;
      e.pb(v);
      while (w[v][k] > 0) {
        e.pb(w[v][k]);
        v = w[v][k];
        k ^= 1;
      }
      reverse(all(e));
      for (auto u : e) cout << u << " ";
      return 0;
    }
  }
  sfd();
  cout << (c ? "Draw" : "Lose");
  // endl
#ifndef ONLINE_JUDGE
  cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
  return 0;
}

Compilation message (stderr)

D.cpp: In function 'void ioi(std::string)':
D.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   26 |   freopen((name + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
D.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   27 |   freopen((name + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 19 / 19
• Subtask 3: 15 / 15
• Subtask 4: 11 / 11
• Subtask 5: 38 / 38