Submission #365008

#	Time	Username	Problem	Language	Result	Execution time	Memory
365008		Falseee	Zoo (COCI19_zoo)	C++17	0 / 110	1 ms	1260 KiB

zoo

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


// c++ template (stolen from AmandOza) !

#define MOD (int)1e9+7
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define mt make_tuple
#define lb lower_bound
#define ub upper_bound
#define f first
#define s second
#define resz resize

#define sz(x) int((x).size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define F0R(i, a) for (int i = 0; i < (a); i++)
#define FORd(i, a, b) for (int i = (b)-1; i >= (a); i--)
#define F0Rd(i, a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto &a : x)


#define L1(u, ...) [&](auto &&u) { return __VA_ARGS__; }
#define L2(u, v, ...) [&](auto &&u, auto &&v) { return __VA_ARGS__; }

#define sort_by(x, y) sort(all(x), [&](const auto &l, const auto &r) { return y; })

    using ll = long long;
using vi = vector<int>;
using vvi = vector<vi>;
using vll = vector<ll>;
using vvll = vector<vll>;
using vb = vector<bool>;
using vd = vector<double>;
using vs = vector<string>;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pdd = pair<double, double>;

using vpii = vector<pii>;
using vpll = vector<pll>;
using vpdd = vector<pdd>;

template <typename T> void ckmin(T &a, const T &b) { a = min(a, b); }
template <typename T> void ckmax(T &a, const T &b) { a = max(a, b); }

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
void usaco(string filename) {
    // #pragma message("be careful, freopen may be wrong")
	freopen((filename + ".in").c_str(), "r", stdin);
	freopen((filename + ".out").c_str(), "w", stdout);
}
namespace __input {
    template <class T1, class T2> void re(pair<T1, T2> &p);
    template <class T> void re(vector<T> &a);
    template <class T, size_t SZ> void re(array<T, SZ> &a);

    template <class T> void re(T &x) { cin >> x; }
    void re(double &x) { string t; re(t); x = stod(t); }
    template <class Arg, class... Args> void re(Arg &first, Args &...rest) { re(first); re(rest...); }

    template <class T1, class T2> void re(pair<T1, T2> &p) { re(p.f, p.s); }
    template <class T> void re(vector<T> &a) { F0R (i, sz(a)) re(a[i]); }
    template <class T, size_t SZ> void re(array<T, SZ> &a) { F0R (i, SZ) re(a[i]); }
}
using namespace __input;

namespace __output {
    template <typename T> struct is_outputtable { template <typename C> static constexpr decltype(declval<ostream &>() << declval<const C &>(), bool()) test(int) { return true; } template <typename C> static constexpr bool test(...) { return false; } static constexpr bool value = test<T>(int()); };
    template <class T, typename V = decltype(declval<const T &>().begin()), typename S = typename enable_if<!is_outputtable<T>::value, bool>::type> void pr(const T &x);

    template <class T, typename V = decltype(declval<ostream &>() << declval<const T &>())> void pr(const T &x) { cout << x; }
        template <class T1, class T2> void pr(const pair<T1, T2> &x);
    template <class Arg, class... Args> void pr(const Arg &first, const Args &...rest) { pr(first); pr(rest...); }

    template <class T, bool pretty = true> void prContain(const T &x) { if (pretty) pr("{"); bool fst = 1; for (const auto &a : x) pr(!fst ? pretty ? ", " : " " : "", a), fst = 0; if (pretty) pr("}"); }

    template <class T> void pc(const T &x) { prContain<T, false>(x); pr("\n"); }
    template <class T1, class T2> void pr(const pair<T1, T2> &x) { pr("{", x.f, ", ", x.s, "}"); }
    template <class T, typename V, typename S> void pr(const T &x) { prContain(x); }

    void ps() { pr("\n"); }
    template <class Arg> void ps(const Arg &first) { pr(first); ps(); }
    template <class Arg, class... Args> void ps(const Arg &first, const Args &...rest) { pr(first, " "); ps(rest...); }
}
using namespace __output;

#define TRACE(x) x
#define __pn(x) pr(#x, " = ")
#ifdef NOAM_LOCAL
#define pd(...) pr("\033[1;31m"), __pn((__VA_ARGS__)), ps(__VA_ARGS__), pr("\033[0m"), cout << flush
#else
#define pd(...)
#endif

namespace __algorithm {
    template <typename T> void dedup(vector<T> &v) { sort(all(v)); v.erase(unique(all(v)), v.end()); }
    template <typename T> typename vector<T>::const_iterator find(const vector<T> &v, const T &x) { auto it = lower_bound(all(v), x); return it != v.end() && *it == x ? it : v.end(); }
    template <typename T> size_t index(const vector<T> &v, const T &x) { auto it = find(v, x); assert(it != v.end() && *it == x); return it - v.begin(); }
    template <typename T1, typename T2> typename vector<pair<T1, T2>>::iterator lower_bound(const vector<pair<T1, T2>> &v, const T1 &x) { return lower_bound(all(v), x, [](pair<T1, T2> a, pair<T1, T2> b) { return a.f < b.f; }); }
    template <typename T1, typename T2> typename vector<pair<T1, T2>>::iterator upper_bound(const vector<pair<T1, T2>> &v, const T1 &x) { return upper_bound(all(v), x, [](pair<T1, T2> a, pair<T1, T2> b) { return a.f < b.f; }); }
    template <typename I, typename B, typename E> struct reversed { I &v_; explicit reversed(I &v) : v_{v} {} B begin() const { return rbegin(v_); } E end() const { return rend(v_); } };
}
using namespace __algorithm;

struct __monostate {
    friend istream &operator>>(istream &is, const __attribute__((unused)) __monostate &ms) { return is; }
    friend ostream &operator<<(ostream &os, const __attribute__((unused)) __monostate &ms) { return os; }
} ms;

namespace __io {
    void setIn(string s) { freopen(s.c_str(), "r", stdin); }
    void setOut(string s) { freopen(s.c_str(), "w", stdout); }
    void setIO() { ios_base::sync_with_stdio(0); cin.tie(0); cout << setprecision(15); }
}
using namespace __io;


const int mxN = 1005;
bool vis[mxN][mxN];
int n, m;
int dx[] = {0, 0, -1, 1};
int dy[] = {1, -1, 0, 0};

char g[mxN][mxN];
bool valid(int i, int j){
    return i >=0 && i < n && j >=0 && j <m;
}

void flood(int i, int j){
    if(vis[i][j]){
        return;
    }
    vis[i][j]=1;

    F0R(dir,4){
        int ci = i+dx[dir];
        int cj = j+dy[dir];
        if(valid(ci, cj) && g[ci][cj] == 'B'){
            flood(ci, cj);
        }
    }
}

int main(){
     cin >> n >>m;
     memset(vis, 0, sizeof(vis));
     F0R(i, n){
         F0R(j, m){
             cin >> g[i][j];
         }
     }
    if(g[0][0] == 'T'){
        F0R(i, n) {
            F0R(j, m){
                if(g[i][j] == 'T'){
                    g[i][j]='B';
                }else if(g[i][j]=='B'){
                    g[i][j]='T';
                }
            }
        }
    }
    int res = 0;
    F0R(i, n){
        F0R(j, m){
            if(g[i][j]=='T'){
                res=1;
                break;
            }
        }
        if(res){
            break;
        }
    }
    F0R(i, n){
        F0R(j, m){
            if(g[i][j] =='B' && !vis[i][j]){
                flood(i, j);
                res+=1;
            }
        }
    }
    cout << res << endl;
}

Compilation message (stderr)

zoo.cpp: In function 'void usaco(std::string)':
zoo.cpp:57:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   57 |  freopen((filename + ".in").c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
zoo.cpp:58:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   58 |  freopen((filename + ".out").c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
zoo.cpp: In function 'void __io::setIn(std::string)':
zoo.cpp:119:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  119 |     void setIn(string s) { freopen(s.c_str(), "r", stdin); }
      |                            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
zoo.cpp: In function 'void __io::setOut(std::string)':
zoo.cpp:120:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  120 |     void setOut(string s) { freopen(s.c_str(), "w", stdout); }
      |                             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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