/*************************************
* 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
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");
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
356 KB |
Output is correct |
| 2 |
Correct |
0 ms |
344 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
356 KB |
Output is correct |
| 2 |
Correct |
0 ms |
344 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
352 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
356 KB |
Output is correct |
| 2 |
Correct |
0 ms |
344 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
352 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Execution timed out |
1595 ms |
32544 KB |
Time limit exceeded |
| 12 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
356 KB |
Output is correct |
| 2 |
Correct |
0 ms |
344 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
456 KB |
Output is correct |
| 5 |
Correct |
0 ms |
344 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
352 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Execution timed out |
1595 ms |
32544 KB |
Time limit exceeded |
| 12 |
Halted |
0 ms |
0 KB |
- |
