結果
問題 | No.1323 うしらずSwap |
ユーザー | t33f |
提出日時 | 2020-12-20 12:03:18 |
言語 | C++17(clang) (17.0.6 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,361 bytes |
コンパイル時間 | 1,115 ms |
コンパイル使用メモリ | 131,704 KB |
実行使用メモリ | 33,768 KB |
最終ジャッジ日時 | 2024-09-21 11:40:18 |
合計ジャッジ時間 | 7,235 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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 | 1 ms
6,812 KB |
testcase_01 | AC | 1 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,944 KB |
testcase_06 | AC | 2 ms
6,944 KB |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | WA | - |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 2 ms
6,944 KB |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | AC | 67 ms
33,716 KB |
testcase_17 | AC | 96 ms
33,508 KB |
testcase_18 | AC | 67 ms
33,720 KB |
testcase_19 | AC | 99 ms
33,556 KB |
testcase_20 | AC | 68 ms
33,696 KB |
testcase_21 | AC | 89 ms
33,708 KB |
testcase_22 | AC | 126 ms
33,676 KB |
testcase_23 | AC | 88 ms
33,540 KB |
testcase_24 | AC | 124 ms
33,564 KB |
testcase_25 | AC | 88 ms
33,588 KB |
testcase_26 | AC | 81 ms
33,612 KB |
testcase_27 | AC | 82 ms
33,624 KB |
testcase_28 | AC | 78 ms
33,716 KB |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | AC | 133 ms
33,336 KB |
testcase_34 | AC | 125 ms
33,612 KB |
testcase_35 | AC | 130 ms
33,628 KB |
testcase_36 | AC | 122 ms
33,748 KB |
testcase_37 | AC | 120 ms
33,544 KB |
testcase_38 | AC | 116 ms
33,452 KB |
testcase_39 | AC | 121 ms
33,488 KB |
testcase_40 | AC | 120 ms
33,608 KB |
testcase_41 | AC | 121 ms
33,624 KB |
testcase_42 | AC | 118 ms
33,508 KB |
testcase_43 | AC | 57 ms
33,576 KB |
testcase_44 | AC | 73 ms
33,600 KB |
testcase_45 | AC | 68 ms
33,744 KB |
testcase_46 | AC | 74 ms
33,460 KB |
testcase_47 | AC | 61 ms
33,528 KB |
testcase_48 | WA | - |
testcase_49 | WA | - |
testcase_50 | WA | - |
testcase_51 | WA | - |
testcase_52 | WA | - |
testcase_53 | WA | - |
testcase_54 | WA | - |
testcase_55 | WA | - |
testcase_56 | WA | - |
testcase_57 | WA | - |
testcase_58 | WA | - |
testcase_59 | AC | 2 ms
6,944 KB |
testcase_60 | AC | 2 ms
6,940 KB |
testcase_61 | WA | - |
ソースコード
#include <cassert> #include <cstring> #include <tuple> #include <algorithm> #include <queue> #include <vector> #include <iostream> using namespace std; template<typename Callback> inline void for_nbd4(int x, int y, int lx, int ux, int ly, int uy, Callback f) { constexpr pair<int, int> dxdy[] = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}}; for (auto [dx, dy] : dxdy) { const int u = x + dx, v = y + dy; if (lx <= u && u < ux && ly <= v && v < uy) f(u, v); } } template<typename Callback> inline void for_nbd4(int x, int y, int X, int Y, Callback f) { for_nbd4(x, y, 0, X, 0, Y, f); } template<typename T, typename Callback> inline T sum_nbd4(int x, int y, int lx, int ux, int ly, int uy, Callback f) { constexpr pair<int, int> dxdy[] = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}}; T result{}; for (auto [dx, dy] : dxdy) { const int u = x + dx, v = y + dy; if (lx <= u && u < ux && ly <= v && v < uy) result += f(u, v); } return result; } template<typename T, typename Callback> inline T sum_nbd4(int x, int y, int X, int Y, Callback f) { return sum_nbd4<T, Callback>(x, y, 0, X, 0, Y, f); } int main() { int h, w, sx, sy, gx, gy; cin >> h >> w >> sx >> sy >> gx >> gy; sx--; sy--; gx--; gy--; vector<string> S(h); for (int i = 0; i < h; i++) cin >> S[i]; int dist[h][w], count[h][w]; pair<int, int> from[h][w]; constexpr int INF = 1<<30; queue<tuple<int, int> > q; q.emplace(sx, sy); for (int i = 0; i < h; i++) for (int j = 0; j < w; j++) if (i == sx && j == sy) { dist[i][j] = 0; count[i][j] = 1; from[i][j] = {-1, -1}; } else { dist[i][j] = INF; count[i][j] = 0; } while (!q.empty()) { auto [x, y] = q.front(); q.pop(); for_nbd4(x, y, h, w, [x=x, y=y, &S, &dist, &q, &count, &from](int u, int v) { if (S[u][v] == '#') return; if (dist[u][v] > dist[x][y] + 1) { dist[u][v] = dist[x][y] + 1; count[u][v] = count[x][y]; from[u][v] = {x, y}; q.emplace(u, v); } else if (dist[u][v] == dist[x][y] + 1) { assert(count[u][v] > 0); assert(count[x][y] > 0); count[u][v] = 2; } }); } // for (int i = 0; i < h; i++) // for (int j = 0; j < w; j++) // cerr << i << ' ' << j << ' ' << dist[i][j] << ' ' << count[i][j] << endl; auto is_empty = [&S](int u, int v) -> int {return int(S[u][v] == '.');}; if (count[gx][gy] == 0) cout << -1 << endl; else if (count[gx][gy] > 1) cout << 2 * dist[gx][gy] << endl; else { for (int x = gx, y = gy;;) { tie(x, y) = from[x][y]; if (x == sx && y == sy) break; if (sum_nbd4<int>(x, y, h, w, is_empty) > 2) { cout << 2 * dist[gx][gy] + 2 << endl; return 0; } } int ans = INF; if (sum_nbd4<int>(gx, gy, h, w, is_empty) == 4 || sum_nbd4<int>(sx, sy, h, w, is_empty) == 4) { ans = 2 * dist[gx][gy] + 4; } for (int x = gx, y = gy;;) { tie(x, y) = from[x][y]; if (x == sx && y == sy) break; S[x][y] = '#'; } const int d0 = dist[gx][gy]; for (int i = 0; i < h; i++) fill(dist[i], dist[i] + w, INF); for_nbd4(sx, sy, h, w, [gx, gy, &q, &dist, &S](int u, int v) { if (S[u][v] == '.' && (u != gx || v != gy)) { q.emplace(u, v); dist[u][v] = 1; } }); while (!q.empty()) { auto [x, y] = q.front(); q.pop(); for_nbd4(x, y, h, w, [x=x, y=y, sx, sy, gx, gy, &S, &dist, &q](int u, int v) { if (S[u][v] == '#') return; if (u == sx && v == sy) return; if (dist[u][v] > dist[x][y] + 1) { dist[u][v] = dist[x][y] + 1; q.emplace(u, v); } }); } ans = min(ans, d0 + dist[gx][gy]); cout << (ans == INF ? -1 : ans) << endl; } }