結果

問題 No.86 TVザッピング(2)
ユーザー DemystifyDemystify
提出日時 2022-05-06 21:26:56
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 1,462 ms / 5,000 ms
コード長 7,231 bytes
コンパイル時間 2,200 ms
コンパイル使用メモリ 212,180 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-07-05 22:31:58
合計ジャッジ時間 6,232 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge3
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 2 ms
5,376 KB
testcase_05 AC 2 ms
5,376 KB
testcase_06 AC 2 ms
5,376 KB
testcase_07 AC 2 ms
5,376 KB
testcase_08 AC 30 ms
5,376 KB
testcase_09 AC 370 ms
5,376 KB
testcase_10 AC 1,462 ms
5,376 KB
testcase_11 AC 2 ms
5,376 KB
testcase_12 AC 2 ms
5,376 KB
testcase_13 AC 2 ms
5,376 KB
testcase_14 AC 26 ms
5,376 KB
testcase_15 AC 26 ms
5,376 KB
testcase_16 AC 26 ms
5,376 KB
testcase_17 AC 2 ms
5,376 KB
testcase_18 AC 2 ms
5,376 KB
testcase_19 AC 2 ms
5,376 KB
testcase_20 AC 2 ms
5,376 KB
testcase_21 AC 551 ms
5,376 KB
testcase_22 AC 2 ms
5,376 KB
testcase_23 AC 29 ms
5,376 KB
testcase_24 AC 2 ms
5,376 KB
testcase_25 AC 2 ms
5,376 KB
testcase_26 AC 2 ms
5,376 KB
testcase_27 AC 2 ms
5,376 KB
testcase_28 AC 2 ms
5,376 KB
testcase_29 AC 327 ms
5,376 KB
testcase_30 AC 2 ms
5,376 KB
testcase_31 AC 2 ms
5,376 KB
testcase_32 AC 2 ms
5,376 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
// --------------------------------------------------------
#define FOR(i,l,r) for (int i = (l); i < (r); ++i)
#define RFOR(i,l,r) for (int i = (r)-1; (l) <= i; --i)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define ALL(c) (c).begin(), (c).end()
#define RALL(c) (c).rbegin(), (c).rend()
#define SORT(c) sort(ALL(c))
#define RSORT(c) sort(RALL(c))
#define MIN(c) *min_element(ALL(c))
#define MAX(c) *max_element(ALL(c))
#define SUM(c) accumulate(ALL(c), 0LL)
#define COUNT(c,v) count(ALL(c),(v))
#define SZ(c) ((ll)(c).size())
#define BIT(b,i) (((b)>>(i)) & 1)
#define PCNT(b) __builtin_popcountll(b)
#define P0(i) (((i) & 1) == 0)
#define P1(i) (((i) & 1) == 1)
#ifdef _LOCAL
    #define debug_bar cerr << "--------------------\n";
    #define debug(x) cerr << "l." << __LINE__ << " : " << #x << " = " << (x) << '\n'
    #define debug_pair(x) cerr << "l." << __LINE__ << " : " << #x << " = (" << x.first << "," << x.second << ")\n";
    template<class T> void debug_line(const vector<T>& ans, int l, int r, int L = 0) { cerr << "l." << L << " :"; for (int i = l; i < r; i++) { cerr << ' ' << ans[i]; } cerr << '\n'; }
#else
    #define cerr if (false) cerr
    #define debug_bar
    #define debug(x)
    #define debug_pair(x)
    template<class T> void debug_line([[maybe_unused]] const vector<T>& ans, [[maybe_unused]] int l, [[maybe_unused]] int r, [[maybe_unused]] int L = 0) {}
#endif
template<class... T> void input(T&... a) { (cin >> ... >> a); }
void print() { cout << '\n'; }
template<class T> void print(const T& a) { cout << a << '\n'; }
template<class T, class... Ts> void print(const T& a, const Ts&... b) { cout << a; (cout << ... << (cout << ' ', b)); cout << '\n'; }
template<class T> void cout_line(const vector<T>& ans, int l, int r) { for (int i = l; i < r; i++) { if (i != l) { cout << ' '; } cout << ans[i]; } cout << '\n'; }
template<class T> bool chmin(T& a, const T b) { if (b < a) { a = b; return 1; } return 0; }
template<class T> bool chmax(T& a, const T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> pair<T,T> divmod(T a, T b) { assert(a >= 0 && b > 0); return make_pair(T(a / b), T(a % b)); }
template<class T> T mod(T x, T m) { assert(m != 0); return T((x % m + m) % m); }
template<class T> T ceil(T a, T b) { if (b < 0) { return ceil(T(-a), T(-b)); } assert(b > 0); return (a < 0 ? T(a / b) : T((a + b - 1) / b)); }
template<class T> T floor(T a, T b) { if (b < 0) { return floor(T(-a), T(-b)); } assert(b > 0); return (a > 0 ? T(a / b) : T((a - b + 1) / b)); }
template<class T> T powint(T x, T n) { assert(n >= 0); if (n == 0) { return T(1); }; T res = powint(x, T(n>>1)); res *= res; if (n & 1) { res *= x; } return res; }
ll bitlen(ll b) { if (b <= 0) { return 0; } return (64LL - __builtin_clzll(b)); }
ll digit_len(ll n) { assert(n >= 0); if (n == 0) { return 1; } ll sum = 0; while (n > 0) { sum++; n /= 10; } return sum; }
ll digit_sum(ll n) { assert(n >= 0); ll sum = 0; while (n > 0) { sum += n % 10; n /= 10; } return sum; }
ll digit_prod(ll n) { assert(n >= 0); if (n == 0) { return 0; } ll prod = 1; while (n > 0) { prod *= n % 10; n /= 10; } return prod; }
ll xor_sum(ll x) { assert(0 <= x); switch (x % 4) { case 0: return x; case 1: return 1; case 2: return x ^ 1; case 3: return 0; } assert(false); }
string toupper(const string& S) { string T(S); for (int i = 0; i < (int)T.size(); i++) { T[i] = toupper(T[i]); } return T; }
string tolower(const string& S) { string T(S); for (int i = 0; i < (int)T.size(); i++) { T[i] = tolower(T[i]); } return T; }
int a2i(const char& c) { assert(islower(c)); return (c - 'a'); }
int A2i(const char& c) { assert(isupper(c)); return (c - 'A'); }
int d2i(const char& d) { assert(isdigit(d)); return (d - '0'); }
char i2a(const int& i) { assert(0 <= i && i < 26); return ('a' + i); }
char i2A(const int& i) { assert(0 <= i && i < 26); return ('A' + i); }
char i2d(const int& i) { assert(0 <= i && i <= 9); return ('0' + i); }
using P = pair<ll,ll>;
using VP = vector<P>;
using VVP = vector<VP>;
using VS = vector<string>;
using VVS = vector<VS>;
using VI = vector<int>;
using VVI = vector<VI>;
using VVVI = vector<VVI>;
using VLL = vector<ll>;
using VVLL = vector<VLL>;
using VVVLL = vector<VVLL>;
using VB = vector<bool>;
using VVB = vector<VB>;
using VVVB = vector<VVB>;
using VD = vector<double>;
using VVD = vector<VD>;
using VVVD = vector<VVD>;
using VLD = vector<ld>;
using VVLD = vector<VLD>;
using VVVLD = vector<VVLD>;
const ld EPS = 1e-10;
const ld PI  = acosl(-1.0);
constexpr ll MOD = 1000000007;
// constexpr ll MOD = 998244353;
constexpr int inf = (1 << 30) - 1;   // 1073741824 - 1
constexpr ll INF = (1LL << 62) - 1;  // 4611686018427387904 - 1
// --------------------------------------------------------
// #include <atcoder/all>
// using namespace atcoder;


int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(15);

    ll H, W; input(H, W);
    VS S(H); REP(i,H) input(S[i]);

    int num = 0;
    REP(h,H) REP(w,W) if (S[h][w] == '.') num++;

    auto on_grid = [&](int h, int w) -> bool { return (0 <= h && h < H && 0 <= w && w < W); };
    const VI dh4 = {0, 1, 0,-1};  // 右,下,左,上
    const VI dw4 = {1, 0,-1, 0};

    bool ok = false;
    VVB vis(H,VB(W,false));
    REP(h,H) REP(w,W) if (S[h][w] == '.') {
        REP(d,4) {
            [&](int ph, int pw, int d) -> void {
                REP(h,H) REP(w,W) vis[h][w] = false;
                int cnt = 0;
                int h = ph, w = pw;

                auto check = [&](int h, int w) -> bool {
                    if (h == ph && w == pw && cnt == num) {
                        ok = true;
                        return true;
                    } else {
                        return false;
                    }
                };

                vis[h][w] = true;
                while (true) {
                    cnt++;
                    {
                        int hh = h + dh4[d];
                        int ww = w + dw4[d];
                        if (on_grid(hh,ww) && S[hh][ww] == '.') {
                            if (check(hh,ww)) break;
                            if (not vis[hh][ww]) {
                                vis[hh][ww] = true;
                                h = hh; w = ww; continue;
                            }
                        }
                    }
                    {
                        d = mod(d - 1, 4);
                        int hh = h + dh4[d];
                        int ww = w + dw4[d];
                        if (on_grid(hh,ww) && S[hh][ww] == '.') {
                            if (check(hh,ww)) break;
                            if (not vis[hh][ww]) {
                                vis[hh][ww] = true;
                                h = hh; w = ww; continue;
                            } else {
                                break;
                            }
                        } else {
                            break;
                        }
                    }
                }
            }(h, w, d);
        }
    }
    string ans = (ok ? "YES" : "NO");
    print(ans);

    return 0;
}
0