結果
| 問題 |
No.3199 Key-Door Grid
|
| コンテスト | |
| ユーザー |
theory_and_me
|
| 提出日時 | 2025-07-12 03:39:59 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 604 ms / 3,000 ms |
| コード長 | 7,867 bytes |
| コンパイル時間 | 2,445 ms |
| コンパイル使用メモリ | 208,128 KB |
| 実行使用メモリ | 149,988 KB |
| 最終ジャッジ日時 | 2025-07-12 03:40:12 |
| 合計ジャッジ時間 | 12,854 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 37 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define rep_(i, a_, b_, a, b, ...) for (int i = (a), lim##i = (b); i < lim##i; ++i)
#define rep(i, ...) rep_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
#define drep_(i, a_, b_, a, b, ...) for (int i = (a) - 1, lim##i = (b); i >= lim##i; --i)
#define drep(i, ...) drep_(i, __VA_ARGS__, __VA_ARGS__, __VA_ARGS__, 0)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#ifdef LOCAL
void debug_out() {
cerr << endl;
}
template <class Head, class... Tail> void debug_out(Head H, Tail... T) {
cerr << ' ' << H;
debug_out(T...);
}
#define debug(...) cerr << 'L' << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define dump(x) cerr << 'L' << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif
using ll = long long;
using ld = long double;
template <class T> using priority_queue_rev = priority_queue<T, vector<T>, greater<T>>;
template <class T> vector<T> make_vec(size_t n, T a) {
return vector<T>(n, a);
}
template <class... Ts> auto make_vec(size_t n, Ts... ts) {
return vector<decltype(make_vec(ts...))>(n, make_vec(ts...));
}
template <class T> inline void fin(const T x) {
cout << x << '\n';
exit(0);
}
template <class T> inline void deduplicate(vector<T> &a) {
sort(all(a));
a.erase(unique(all(a)), a.end());
}
template <class T> inline bool chmin(T &a, const T b) {
if (a > b) {
a = b;
return true;
}
return false;
}
template <class T> inline bool chmax(T &a, const T b) {
if (a < b) {
a = b;
return true;
}
return false;
}
template <class T> inline int sz(const T &x) {
return x.size();
}
template <class T> inline int count_between(const vector<T> &a, T l, T r) {
return lower_bound(all(a), r) - lower_bound(all(a), l);
}
template <class T1, class T2> istream &operator>>(istream &is, pair<T1, T2> &p) {
is >> p.first >> p.second;
return is;
}
template <class T1, class T2> ostream &operator<<(ostream &os, pair<T1, T2> &p) {
os << '(' << p.first << ", " << p.second << ')';
return os;
}
template <class T, size_t n> istream &operator>>(istream &is, array<T, n> &v) {
for (auto &e : v) is >> e;
return is;
}
template <class T, size_t n> ostream &operator<<(ostream &os, array<T, n> &v) {
for (auto &e : v) os << e << ' ';
return os;
}
template <class T> istream &operator>>(istream &is, vector<T> &v) {
for (auto &e : v) is >> e;
return is;
}
template <class T> ostream &operator<<(ostream &os, vector<T> &v) {
for (auto &e : v) os << e << ' ';
return os;
}
template <class T> istream &operator>>(istream &is, deque<T> &v) {
for (auto &e : v) is >> e;
return is;
}
template <class T> ostream &operator<<(ostream &os, deque<T> &v) {
for (auto &e : v) os << e << ' ';
return os;
}
inline ll floor_div(ll x, ll y) {
if (y < 0) x = -x, y = -y;
return x >= 0 ? x / y : (x - y + 1) / y;
}
inline ll ceil_div(ll x, ll y) {
if (y < 0) x = -x, y = -y;
return x >= 0 ? (x + y - 1) / y : x / y;
}
inline int floor_log2(const ll x) {
assert(x > 0);
return 63 - __builtin_clzll(x);
}
inline int ceil_log2(const ll x) {
assert(x > 0);
return (x == 1) ? 0 : 64 - __builtin_clzll(x - 1);
}
inline int popcount(const ll x) {
return __builtin_popcountll(x);
}
struct fast_ios {
fast_ios() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
cout << fixed << setprecision(20);
};
} fast_ios;
// 時間計測
auto system_now = std::chrono::system_clock::now();
int check_time() {
auto now = std::chrono::system_clock::now();
return std::chrono::duration_cast<std::chrono::milliseconds>(now - system_now).count();
}
// 乱数
struct Xorshift {
uint32_t x = 123456789, y = 362436069, z = 521288629, w = 88675123;
uint32_t rand_int() {
uint32_t t = x ^ (x << 11);
x = y;
y = z;
z = w;
return w = (w ^ (w >> 19)) ^ (t ^ (t >> 8));
}
// 0以上mod未満の整数を乱択
uint32_t rand_int(uint32_t mod) {
return rand_int() % mod;
}
// l以上r未満の整数を乱択
uint32_t rand_int(uint32_t l, uint32_t r) {
assert(l < r);
return l + rand_int(r - l);
}
// 0以上1以下の実数を乱沢
double rand_double() {
return (double)rand_int() / UINT32_MAX;
}
};
Xorshift xor_shift;
// constexpr int INF = numeric_limits<int>::max() >> 2;
// constexpr ll INFll = numeric_limits<ll>::max() >> 2;
// constexpr ld EPS = 1e-10;
// const ld PI = acos(-1.0);
// using mint = modint998244353;
// using mint = modint1000000007;
// using mint = modint;
// using Vm = V<mint>; using VVm = VV<mint>;
int main() {
int H, W, M;
cin >> H >> W >> M;
vector<string> S(H);
rep(i, H) {
cin >> S[i];
}
// 各状態は,(i, j, k) で表される
// i: 現在の行
// j: 現在の列
// k: 現在の状態 (0 <= k <= M)
auto encode = [&](int i, int j, int k) {
return (i * W + j) * (M + 1) + k;
};
auto decode = [&](int x) {
int k = x % (M + 1);
x /= (M + 1);
int j = x % W;
int i = x / W;
return make_tuple(i, j, k);
};
vector<vector<int>> G(H * W * (M + 1));
auto is_key = [&](char c) {
if ('1' <= c && c <= '9') {
return c - '1';
} else {
return -1;
}
};
auto is_door = [&](char c) {
if ('a' <= c && c <= 'i') {
return c - 'a';
} else {
return -1;
}
};
auto in_bounds = [&](int i, int j) {
return 0 <= i && i < H && 0 <= j && j < W;
};
vector<int> dx = {0, 1, 0, -1};
vector<int> dy = {1, 0, -1, 0};
rep(idx, H * W * (M + 1)) {
auto [i, j, k] = decode(idx);
if (S[i][j] == '#') {
continue;
} else {
rep(dir, 4) {
int ni = i + dx[dir];
int nj = j + dy[dir];
if (!in_bounds(ni, nj)) continue;
if (S[ni][nj] == '#') {
continue;
} else if (S[ni][nj] == '.' or S[ni][nj] == 'S' or S[ni][nj] == 'G') {
int next_idx = encode(ni, nj, k);
G[idx].push_back(next_idx);
} else if (is_key(S[ni][nj]) != -1) {
int key = is_key(S[ni][nj]);
int next_ix = encode(ni, nj, key + 1);
G[idx].push_back(next_ix);
} else if (is_door(S[ni][nj]) != -1) {
int door = is_door(S[ni][nj]);
if (k == door + 1) {
int next_ix = encode(ni, nj, k);
G[idx].push_back(next_ix);
}
}
}
}
}
int si = -1, sj = -1;
int gi = -1, gj = -1;
rep(i, H) {
rep(j, W) {
if (S[i][j] == 'S') {
si = i;
sj = j;
} else if (S[i][j] == 'G') {
gi = i;
gj = j;
}
}
}
int start = encode(si, sj, 0);
// グラフG上のBFSで距離を求める
vector<int> dist(H * W * (M + 1), -1);
queue<int> que;
que.push(start);
dist[start] = 0;
while (!que.empty()) {
int v = que.front();
que.pop();
for (int nv : G[v]) {
if (dist[nv] == -1) {
dist[nv] = dist[v] + 1;
que.push(nv);
}
}
}
int ans = INT_MAX;
rep(k, M + 1) {
int v = encode(gi, gj, k);
if (dist[v] != -1) {
chmin(ans, dist[v]);
}
}
cout << (ans == INT_MAX ? -1 : ans) << '\n';
return 0;
}
theory_and_me