Submission #221571

#	Time	Username	Problem	Language	Result	Execution time	Memory
221571		Haunted_Cpp	Zoo (COCI19_zoo)	C++17	45 / 110	2079 ms	10920 KiB

zoo

#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <cassert>
#include <string>
#include <cstring>
#include <bitset>
#include <random>
#include <chrono>
#include <iomanip>
 
/*
#pragma GCC optimize ("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
*/
 
#define FOR(i, a, b) for(int i = a; i < (int) b; i++)
#define F0R(i, a) FOR (i, 0, a)
#define ROF(i, a, b) for(int i = a; i >= (int) b; i--)
#define R0F(i, a) ROF(i, a, 0)
#define GO(i, a) for (auto i : a)
 
#define rsz resize
#define eb emplace_back
#define pb push_back
#define sz(x) (int) x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define f first
#define s second
 
using namespace std;
 
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<pii> vpii;
typedef vector<vi> vvi;
typedef vector<vpii> vvpii;
typedef long long i64;
typedef vector<i64> vi64;
typedef vector<vi64> vvi64;
typedef pair<i64, i64> pi64;
typedef vector<pi64> vpi64;
 
const int dr[] = {+1, -1, +0, +0, +1, -1, +1, -1};
const int dc[] = {+0, +0, +1, -1, +1, -1, -1, +1};
const int ms[] = {+31, +29, +31, 30, +31, +30, +31, +31, +30, +31, +30, +31};
 
const int N = 1e3 + 5;

int ordem_visita = 1;
int vis [N][N];
char g [N][N];
 
int r, c;
 
void dfs (int linha, int coluna, char t) {
  if (linha < 0 || coluna < 0 || linha >= r || coluna >= c) return;
  if (g[linha][coluna] == '*') return;
  if (vis[linha][coluna] == ordem_visita) return;
  if (g[linha][coluna] == 'B' || g[linha][coluna] == 'T') if (g[linha][coluna] != t) return;
  vis[linha][coluna] = ordem_visita;
  g[linha][coluna] = '#';
  F0R (i, 4) dfs (linha + dr[i], coluna + dc[i], t);
}

bool can_reach (int linha, int coluna, char t) {
  if (linha < 0 || coluna < 0 || linha >= r || coluna >= c) return false;
  if (linha == 0 && coluna == 0) return true;
  if (g[linha][coluna] == '*') return false;
  if (vis[linha][coluna] == ordem_visita) return false;
  if (g[linha][coluna] == 'B' || g[linha][coluna] == 'T') if (g[linha][coluna] != t) return false;
  vis[linha][coluna] = ordem_visita;
  bool ans = false;
  F0R (i, 4) ans |= can_reach (linha + dr[i], coluna + dc[i], t);
  return ans;
}
 
int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cin >> r >> c;
  F0R (i, r) F0R (j, c) cin >> g[i][j];
  int res = 0;
  while (1) {
    F0R (i, r) F0R (j, c) {
      if (g[i][j] == '*') continue;
      if (g[i][j] == '#') continue;
      if (can_reach (i, j, g[i][j]) == false) continue;
      ++ordem_visita;
      ++res;
      dfs (i, j, g[i][j]);
      ++ordem_visita;
    }
    F0R (i, r) F0R (j, c) if (g[i][j] == 'B' || g[i][j] == 'T') goto fim;
    break;
    fim:;
  }
  cout << res << '\n';
  return 0;
}

• Subtask 1: 45 / 45
• Subtask 2: 0 / 65