Submission #879717

#TimeUsernameProblemLanguageResultExecution timeMemory
879717marvinthangRobots (APIO13_robots)C++17
30 / 100
1595 ms32544 KiB
/************************************* * author: marvinthang * * created: 28.11.2023 08:29:17 * *************************************/ #include <bits/stdc++.h> using namespace std; #define fi first #define se second #define left ___left #define right ___right #define TIME (1.0 * clock() / CLOCKS_PER_SEC) #define MASK(i) (1LL << (i)) #define BIT(x, i) ((x) >> (i) & 1) #define __builtin_popcount __builtin_popcountll #define ALL(v) (v).begin(), (v).end() #define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i) #define REPD(i, n) for (int i = (n); i-- > 0; ) #define FOR(i, a, b) for (int i = (a), _b = (b); i < _b; ++i) #define FORD(i, b, a) for (int i = (b), _a = (a); --i >= _a; ) #define FORE(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i) #define FORDE(i, b, a) for (int i = (b), _a = (a); i >= _a; --i) #define scan_op(...) istream & operator >> (istream &in, __VA_ARGS__ &u) #define print_op(...) ostream & operator << (ostream &out, const __VA_ARGS__ &u) #ifdef LOCAL #include "debug.h" #else #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); } #define DB(...) 23 #define db(...) 23 #define debug(...) 23 #endif template <class U, class V> scan_op(pair <U, V>) { return in >> u.first >> u.second; } template <class T> scan_op(vector <T>) { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; } template <class U, class V> print_op(pair <U, V>) { return out << '(' << u.first << ", " << u.second << ')'; } template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")"; else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); } template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); } template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; } template <class A, class B> bool minimize(A &a, B b) { if (a > b) { a = b; return true; } return false; } template <class A, class B> bool maximize(A &a, B b) { if (a < b) { a = b; return true; } return false; } // end of template const int INF = 1e9; // anti-clockwise const int dx[] = {1, 0, -1, 0}; const int dy[] = {0, 1, 0, -1}; void process(void) { int n, h, w; cin >> n >> w >> h; vector <string> grid(h); cin >> grid; auto inside = [&] (int u, int v) { return 0 <= u && u < h && 0 <= v && v < w && grid[u][v] != 'x'; }; vector id(h, vector(w, -1)); int cnt = 0; REP(x, h) REP(y, w) if (inside(x, y)) { bool valid = false; if ('0' <= grid[x][y] && grid[x][y] <= '9') { --grid[x][y]; valid = true; } if (!valid) REP(d, 4) if (!inside(x + dx[d], y + dy[d])) { valid = true; break; } // if (valid) cout << cnt << ' ' << x << ' ' << y << '\n'; if (valid) id[x][y] = cnt++; } vector <vector <int>> adj(cnt); REP(x, h) REP(y, w) if (inside(x, y)) { REP(d, 4) if (!inside(x + dx[d], y + dy[d])) { int u = x, v = y, cur_d = d; while (inside(u, v)) { if ((u != x || v != y) && id[u][v] >= 0) { adj[id[u][v]].push_back(id[x][y]); } if (grid[u][v] == 'A') cur_d = (cur_d + 3) & 3; else if (grid[u][v] == 'C') cur_d = (cur_d + 1) & 3; u -= dx[cur_d]; v -= dy[cur_d]; } } } vector dp(cnt, vector(n, vector(n, INF))); REP(x, h) REP(y, w) if ('0' <= grid[x][y] && grid[x][y] <= '9') dp[id[x][y]][grid[x][y] - '0'][grid[x][y] - '0'] = 0; REPD(l, n) FOR(r, l, n) { REP(i, cnt) FOR(k, l, r) minimize(dp[i][l][r], dp[i][l][k] + dp[i][k + 1][r]); priority_queue <pair <int, int>> pq; REP(i, cnt) if (dp[i][l][r] < INF) pq.emplace(dp[i][l][r], i); while (!pq.empty()) { auto [du, u] = pq.top(); pq.pop(); if (du != dp[u][l][r]) continue; for (int v: adj[u]) if (minimize(dp[v][l][r], dp[u][l][r] + 1)) pq.emplace(dp[v][l][r], v); } } int res = INF; REP(i, cnt) minimize(res, dp[i][0][n - 1]); cout << (res == INF ? -1 : res) << '\n'; } int main(void) { ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr); file("robots"); // int t; cin >> t; while (t--) process(); // cerr << "Time elapsed: " << TIME << " s.\n"; return (0^0); }

Compilation message (stderr)

robots.cpp: In function 'int main()':
robots.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
robots.cpp:107:2: note: in expansion of macro 'file'
  107 |  file("robots");
      |  ^~~~
robots.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
robots.cpp:107:2: note: in expansion of macro 'file'
  107 |  file("robots");
      |  ^~~~
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