結果
問題 | No.86 TVザッピング(2) |
ユーザー | Pachicobue |
提出日時 | 2017-08-04 00:07:50 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 3 ms / 5,000 ms |
コード長 | 7,484 bytes |
コンパイル時間 | 1,824 ms |
コンパイル使用メモリ | 178,588 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-07 10:39:40 |
合計ジャッジ時間 | 2,830 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
(要ログイン)
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 | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 2 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 | 2 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 3 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 | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 2 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 | 2 ms
5,376 KB |
testcase_30 | AC | 3 ms
5,376 KB |
testcase_31 | AC | 2 ms
5,376 KB |
testcase_32 | AC | 2 ms
5,376 KB |
ソースコード
// {{{ Templates #include <bits/stdc++.h> #define show(x) cerr << #x << " = " << x << endl using namespace std; using ll = long long; using pii = pair<int, int>; using vi = vector<int>; template <typename T> ostream& operator<<(ostream& os, const vector<T>& v) { os << "sz:" << v.size() << "\n["; for (const auto& p : v) { os << p << ","; } os << "]\n"; return os; } template <typename S, typename T> ostream& operator<<(ostream& os, const pair<S, T>& p) { os << "(" << p.first << "," << p.second << ")"; return os; } constexpr ll MOD = (ll)1e9 + 7LL; template <typename T> constexpr T INF = numeric_limits<T>::max() / 100; // }}} int N, M; inline bool in(const int x, const int y) { return 0 <= x and x < M and 0 <= y and y < N; } inline int left(const int prev) { return (prev + 1) % 4; } inline int right(const int prev) { return (prev + 3) % 4; } int main() { ios::sync_with_stdio(false); cin.tie(0); constexpr int dir[5] = {1, 0, -1, 0, 1}; cin >> N >> M; vector<vector<bool>> ok(N, vector<bool>(M, true)); int ch = 0; for (int i = 0; i < N; i++) { string s; cin >> s; for (int j = 0; j < M; j++) { if (s[j] == '#') { ok[i][j] = false; } else { ch++; } } } // for (int i = 0; i < N; i++) { // for (int j = 0; j < M; j++) { // if (ok[i][j]) { // int neighbor = 0; // for (int d = 0; d < 4; d++) { // const int dx = dir[d]; // const int dy = dir[d + 1]; // const int newx = j + dx; // const int newy = i + dy; // if (in(newx, newy) and ok[newy][newx]) { // neighbor++; // } // } // if (neighbor != 2) { // cout << "NO" << endl; // return 0; // } // } // } // } for (int y = 0; y < N; y++) { for (int x = 0; x < M; x++) { if (ok[y][x]) { // left for (int d = 0; d < 4; d++) { const int dx = dir[d]; const int dy = dir[d + 1]; const int newx = x + dx; const int newy = y + dy; vector<vector<bool>> checked(N, vector<bool>(M, false)); bool used_right = false; if (in(newx, newy) and ok[newy][newx]) { int prevdir = d; int posx = newx; int posy = newy; int cnt = 0; while (true) { checked[posy][posx] = true; cnt++; if (posx == x and posy == y) { break; } int nextx = posx + dir[prevdir]; int nexty = posy + dir[prevdir + 1]; if (in(nextx, nexty) and ok[nexty][nextx] and (not checked[nexty][nextx])) { posx = nextx; posy = nexty; continue; } nextx = posx + dir[left(prevdir)]; nexty = posy + dir[left(prevdir) + 1]; if (in(nextx, nexty) and ok[nexty][nextx] and (not checked[nexty][nextx])) { prevdir = left(prevdir); posx = nextx; posy = nexty; continue; } if (not used_right) { nextx = posx + dir[right(prevdir)]; nexty = posy + dir[right(prevdir) + 1]; if (in(nextx, nexty) and ok[nexty][nextx] and (not checked[nexty][nextx])) { prevdir = right(prevdir); posx = nextx; posy = nexty; used_right = true; continue; } } break; } if (cnt == ch) { cout << "YES" << endl; return 0; } } } //right for (int d = 0; d < 4; d++) { const int dx = dir[d]; const int dy = dir[d + 1]; const int newx = x + dx; const int newy = y + dy; vector<vector<bool>> checked(N, vector<bool>(M, false)); bool used_left = false; if (in(newx, newy) and ok[newy][newx]) { int prevdir = d; int posx = newx; int posy = newy; int cnt = 0; while (true) { checked[posy][posx] = true; cnt++; if (posx == x and posy == y) { break; } int nextx = posx + dir[prevdir]; int nexty = posy + dir[prevdir + 1]; if (in(nextx, nexty) and ok[nexty][nextx] and (not checked[nexty][nextx])) { posx = nextx; posy = nexty; continue; } nextx = posx + dir[right(prevdir)]; nexty = posy + dir[right(prevdir) + 1]; if (in(nextx, nexty) and ok[nexty][nextx] and (not checked[nexty][nextx])) { prevdir = right(prevdir); posx = nextx; posy = nexty; continue; } if (not used_left) { nextx = posx + dir[left(prevdir)]; nexty = posy + dir[left(prevdir) + 1]; if (in(nextx, nexty) and ok[nexty][nextx] and (not checked[nexty][nextx])) { prevdir = left(prevdir); posx = nextx; posy = nexty; used_left = true; continue; } } break; } if (cnt == ch) { cout << "YES" << endl; return 0; } } } cout << "NO" << endl; return 0; } } } cout << "NO" << endl; return 0; }