結果
問題 | No.367 ナイトの転身 |
ユーザー |
|
提出日時 | 2016-04-30 00:01:04 |
言語 | C++11(廃止可能性あり) (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 94 ms / 2,000 ms |
コード長 | 1,942 bytes |
コンパイル時間 | 1,455 ms |
コンパイル使用メモリ | 168,904 KB |
実行使用メモリ | 6,824 KB |
最終ジャッジ日時 | 2024-10-04 19:41:50 |
合計ジャッジ時間 | 2,541 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 27 |
ソースコード
#include <bits/stdc++.h>using namespace std;typedef long long ll;template<typename T> using Graph = vector<vector<T>>;#define REP(i, a, b) for (int i = (int)(a); i < (int)(b); i++)#define rep(i, a) REP(i, 0, a)#define EACH(i, a) for (auto i: a)#define ITR(x, a) for (__typeof(a.begin()) x = a.begin(); x != a.end(); x++)#define ALL(a) (a.begin()), (a.end())#define HAS(a, x) (a.find(x) != a.end())#define endl '\n'int dx[] = {2, 2, 1, 1, -1, -1, -2, -2};int dy[] = {1, -1, 2, -2, 2, -2, 1, -1};int dx2[] = {1, -1, -1, 1};int dy2[] = {1, 1, -1, -1};const int inf = 1e8;int H, W;int mn[505][505][2];string s[505];bool is_inside(int x, int y) {return (0 <= x && x < W && 0 <= y && y < H);}int main(void) {cin.tie(0);ios::sync_with_stdio(false);cin >> H >> W;rep(i, H) cin >> s[i];int sx = 0, sy = 0, gx = 0, gy = 0;rep(y, H) rep(x, W) {mn[y][x][0] = mn[y][x][1] = inf;if (s[y][x] == 'S') sx = x, sy = y;if (s[y][x] == 'G') gx = x, gy = y;}int ans = -1;priority_queue<tuple<int, int, int, int>> que;que.push(make_tuple(0, sx, sy, 0));while (!que.empty()) {auto ele = que.top(); que.pop();int cost = -get<0>(ele), x = get<1>(ele), y = get<2>(ele), z = get<3>(ele);if (x == gx && y == gy) {ans = cost;break;}if (s[y][x] == 'R') z = 1 - z;if (z == 0) {rep(i, 8) {int nx = x + dx[i], ny = y + dy[i];if (!is_inside(nx, ny)) continue;if (mn[ny][nx][z] <= cost + 1) continue;mn[ny][nx][z] = cost + 1;que.push(make_tuple(-(cost + 1), nx, ny, z));}} else {rep(i, 4) {int nx = x + dx2[i], ny = y + dy2[i];if (!is_inside(nx, ny)) continue;if (mn[ny][nx][z] <= cost + 1) continue;mn[ny][nx][z] = cost + 1;que.push(make_tuple(-(cost + 1), nx, ny, z));}}}cout << ans << endl;return 0;}