Submission #681545

#	Time	Username	Problem	Language	Result	Execution time	Memory
681545		peijar	Furniture (JOI20_furniture)	C++17	5 / 100	5067 ms	600 KiB

furniture

#include <bits/stdc++.h>
#define int long long
using namespace std;

namespace std {
template <typename T> ostream &operator<<(ostream &out, const vector<T> &vec) {
  out << "[";
  for (int i = 0; i < (int)vec.size(); ++i) {
    out << vec[i];
    if (i + 1 < (int)vec.size())
      out << ", ";
  }
  return out << "]";
}
} // namespace std

void dbg_out() { cout << endl; }
template <typename Head, typename... Tail> void dbg_out(Head H, Tail... T) {
  cout << ' ' << H;
  dbg_out(T...);
}

#ifdef DEBUG
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

const int MAXN = 1000;

using bs = bitset<MAXN>;

signed main(void) {
  ios_base::sync_with_stdio(false);
  cin.tie(0);

  int nbLig, nbCol;
  cin >> nbLig >> nbCol;

  vector<bs> accessible(nbLig);
  for (int lig = 0; lig < nbLig; ++lig)
    for (int col = 0; col < nbCol; ++col) {
      int x;
      cin >> x;
      if (!x)
        accessible[lig][col] = 1;
    }

  int Q;
  cin >> Q;
  for (int iRequete = 0; iRequete < Q; ++iRequete) {
    int r, c;
    cin >> r >> c;
    --r, --c;

    accessible[r][c] = 0;
    bs prv;
    for (int i = 0; i < nbCol; ++i) {
      if (!accessible[0][i])
        break;
      prv[i] = 1;
    }
    for (int lig = 1; lig < nbLig; ++lig) {
      prv &= accessible[lig];
      for (int col = 1; col < nbCol; ++col)
        if (accessible[lig][col])
          prv[col] = prv[col] || prv[col - 1];
    }

    cout << prv[nbCol - 1] << '\n';
    if (!prv[nbCol - 1])
      accessible[r][c] = 1;
  }
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95