Submission #950559

#	Time	Username	Problem	Language	Result	Execution time	Memory
950559		xynex	Furniture (JOI20_furniture)	C++17	100 / 100	219 ms	23892 KiB

furniture

/**
  * Author: Tenjin
  * Created: 27.04.2022 18:58
  * Why am I so stupid? :c
  * Slishkom slab
**/

#include <bits/stdc++.h>

 #pragma GCC optimize("inline")
 #pragma GCC optimize("-fgcse,-fgcse-lm")
 #pragma GCC optimize("-ftree-pre,-ftree-vrp")
 #pragma GCC optimize("-ffast-math")
 #pragma GCC optimize("-fipa-sra")
 #pragma GCC optimize("-fpeephole2")
 #pragma GCC optimize("-fsched-spec")
 #pragma GCC optimize("Ofast,no-stack-protector")
 #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
 #pragma GCC optimize("unroll-loops")

using namespace std;
#define ll long long
#define dl double long
#define ull unsigned long long
#define pr pair
#define vt vector
#define ff first
#define ss second
#define mp make_pair
#define sz(a) (int)a.size()
#define pb push_back
#define pf push_front
#define popB pop_back
#define popF pop_front
#define bit_count __builtin_popcount
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sp(x) fixed << setprecision(x)

template<typename T> T get_rand(T l, T r) {
  random_device rd;
  mt19937 gen(rd());
  return uniform_int_distribution<T>(l, r)(gen);
}
template<typename T> T lcm(T a, T b) { return a * (b / __gcd(a, b)); }

template<class A>  void read(vt<A>& v);
template<class A, size_t S> void read(array<A, S>& a);
template<class T> void read(T& x) { cin >> x; }
void read(double& d) { string t; read(t); d = stod(t); }
void read(long double& d) { string t; read(t); d = stold(t); }
template<class H, class... T> void read(H& h, T&... t) { read(h); read(t...); }
template<class A> void read(vt<A>& x) { for (auto& a : x) read(a); }
template<class A, size_t S> void read(array<A, S>& x) { for (auto& a : x) read(a); }

string to_string(char c) { return string(1, c); }
string to_string(bool b) { return b ? "true" : "false"; }
string to_string(const char* s) { return string(s); }
string to_string(string s) { return s; }
string to_string(vt<bool> v) { string res; for (int i = 0; i < sz(v); ++i) res += char('0' + v[i]); return res; }
template<size_t S> string to_string(bitset<S> b) { string res; for (int i = 0; i < S; ++i) res += char('0' + b[i]); return res; }
template<class T> string to_string(T v) { bool f = 1; string res; for (auto x : v) { if (!f) res += ' '; f = 0; res += to_string(x); } return res; }

template<class A> void write(A x) { cout << to_string(x); }
template<class H, class... T> void write(const H& h, const T&... t) { write(h); write(t...); }

void print() { write("\n"); }
template<class H, class... T> void print(const H& h, const T&... t) { write(h); if (sizeof...(t)) write(' '); print(t...); }

void freop(string s) {
  freopen((s + ".in").c_str(), "r", stdin);
  freopen((s + ".out").c_str(), "w", stdout);
}

const int MOD = 998244353;
const ll INF = 1e14;
const dl pi = acos(-1);
const dl eps = 1e-12;
const int sq = 700;

int dx[] = {-1, 0, 1, 0};
int dy[] = {0, -1, 0, 1};
/* ll vs int*/

const int N = 1e3 + 5;
const int M = 2e6 + 6;


int might[2 * N];
int in[N][N], out[N][N];
int a[N][N], n, m;
void go(int x, int y) {
  if(a[x][y]) return;
  a[x][y] = 1;
  might[x + y]--;
  if(!--in[x + 1][y]) go(x + 1, y);
  if(!--in[x][y + 1]) go(x, y + 1);
  if(!--out[x - 1][y]) go(x - 1, y);
  if(!--out[x][y - 1]) go(x, y - 1);
}
void solve() {
  read(n, m);
  for(int i = 1; i <= n; ++i) {
    for(int j = 1; j <= m; ++j) {
      might[i + j]++;
      in[i + 1][j]++;
      in[i][j + 1]++;
      out[i - 1][j]++, out[i][j - 1]++;
      a[i][0] = a[i][m + 1] = a[0][j] = a[n + 1][j] = 1;
    }
  }
  /*for(int i = 1; i <= n + m; ++i) write(might[i], ' ');
  print("");
  for(int i = 1; i <= n; ++i) {
    for(int j = 1; j <= m; ++j) write(in[i][j], ' ');
    print("");
  }

  for(int i = 1; i <= n; ++i) {
    for(int j = 1; j <= m; ++j) write(out[i][j], ' ');
    print("");
  }
*/
  for(int i = 1; i <= n; ++i) {
    for(int j = 1; j <= m; ++j) {
      int cur; read(cur);
      if(cur) go(i, j);
    }
  }
  int q; read(q);
  while(q--) {
    int x, y; read(x, y);
    if(a[x][y]) {
      print(1);
      continue;
    }
    //print("X", might[x + y]);
    if(might[x + y] == 1) print(0);
    else {
      print(1);
      go(x, y);
    }
  }
}

int main() {
  //srand(time(NULL));
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  //freop("");
  int t = 1;
  //read(t);
  for (int i = 1; i <= t; ++i) {
    //write("Case #" + to_string(i) + ": ");
    solve();
  }
  return 0;
}

Compilation message (stderr)

furniture.cpp: In function 'void freop(std::string)':
furniture.cpp:71:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |   freopen((s + ".in").c_str(), "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
furniture.cpp:72:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |   freopen((s + ".out").c_str(), "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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