結果

問題 No.3199 Key-Door Grid
コンテスト
ユーザー tatesoto
提出日時 2025-07-21 16:53:43
言語 C++23
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 154 ms / 3,000 ms
コード長 2,942 bytes
コンパイル時間 5,768 ms
コンパイル使用メモリ 334,076 KB
実行使用メモリ 33,408 KB
最終ジャッジ日時 2025-07-21 16:53:53
合計ジャッジ時間 9,921 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge5
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 37
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function ‘void solve()’:
main.cpp:78:18: warning: ‘gx’ may be used uninitialized [-Wmaybe-uninitialized]
   78 |         if (dp[gx][gy][i] < INF) {
      |                  ^
main.cpp:40:16: note: ‘gx’ was declared here
   40 |     ll sx, sy, gx, gy = -1;
      |                ^~
main.cpp:49:10: warning: ‘sx’ may be used uninitialized [-Wmaybe-uninitialized]
   49 |     dp[sx][sy][0] = 0;
      |          ^
main.cpp:40:8: note: ‘sx’ was declared here
   40 |     ll sx, sy, gx, gy = -1;
      |        ^~
main.cpp:49:14: warning: ‘sy’ may be used uninitialized [-Wmaybe-uninitialized]
   49 |     dp[sx][sy][0] = 0;
      |              ^
main.cpp:40:12: note: ‘sy’ was declared here
   40 |     ll sx, sy, gx, gy = -1;
      |            ^~

ソースコード

diff # 

#include <bits/stdc++.h>
using namespace std;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif
#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif
using ll = long long;
using ld = long double;
using P = pair<ll,ll>;
template<class T> using pq = priority_queue<T>;
template<class T> using pq_g = priority_queue<T, vector<T>, greater<T>>;
#define out(x) cout<<x<<'\n'
#define dump(x) cerr<<#x<<" = "<<x<<'\n'
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define OVERLOAD_REP(_1,_2,_3,name,...) name
#define REP1(i,n) for (auto i = std::decay_t<decltype(n)>{}; (i) != (n); ++(i))
#define REP2(i, l, r) for (auto i = (l); (i) != (r); ++(i))
#define rep(...) OVERLOAD_REP(__VA_ARGS__, REP2, REP1)(__VA_ARGS__)
template<class T> inline bool chmin(T& a, T b) {if(a > b){a = b; return true;} else {return false;}};
template<class T> inline bool chmax(T& a, T b) {if(a < b){a = b; return true;} else {return false;}};
const ll INF=(1LL<<60);
const ll mod=998244353;
using Graph = vector<vector<ll>>;
using Network = vector<vector<pair<ll,ll>>>;
using Grid = vector<string>;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
const int dx2[8] = {1, 1,  1, 0,  0, -1, -1, -1};
const int dy2[8] = {1, 0, -1, 1, -1,  1,  0, -1};

void solve() {
    ll H, W, M;
    cin>>H>>W>>M;
    vector<string> S(H);
    rep(i, H) cin >> S[i];
    ll sx, sy, gx, gy = -1;
    rep(i, H) rep(j, W) {
        if (S[i][j] == 'S') {
            sx = i; sy = j;
        } else if (S[i][j] == 'G') {
            gx = i; gy = j;
        }
    }
    vector<vector<vector<ll>>> dp(H, vector<vector<ll>>(W, vector<ll>(M+1, INF)));
    dp[sx][sy][0] = 0;
    queue<tuple<ll, ll, ll>> q;
    q.push({sx, sy, 0});
    while (!q.empty()) {
        auto [x, y, m] = q.front(); q.pop();
        rep(i, 4) {
            ll nx = x + dx[i], ny = y + dy[i];
            if (nx < 0 || nx >= H || ny < 0 || ny >= W || S[nx][ny] == '#') continue;
            if (S[nx][ny] >= '1' && S[nx][ny] <= '9') {
                ll nm = (S[nx][ny] - '0');
                if (chmin(dp[nx][ny][nm], dp[x][y][m] + 1)) {
                    q.push({nx, ny, nm});
                }
            }
            else if (S[nx][ny] >= 'a' && S[nx][ny] <= 'i') {
                ll num = (S[nx][ny] - 'a' + 1);
                if (m == num && chmin(dp[nx][ny][m], dp[x][y][m] + 1)) {
                    q.push({nx, ny, m});
                }
            }
            else {
                if (chmin(dp[nx][ny][m], dp[x][y][m] + 1)) {
                    q.push({nx, ny, m});
                }
            }
        }
    }
    ll ans = INF;
    rep(i, M+1) {
        if (dp[gx][gy][i] < INF) {
            chmin(ans, dp[gx][gy][i]);
        }
    }
    if (ans == INF) {
        out(-1);
    } else {
        out(ans);
    }
}

int main() {
    cin.tie(0);
    ios_base::sync_with_stdio(false);
    solve();
    return 0;
}
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