/**
* author : pham van sam
* created : 15 June 2023 (Thursday)
**/
#include <bits/stdc++.h>
using namespace std;
using namespace chrono;
#define MASK(x) (1LL << (x))
#define BIT(x, i) (((x) >> (i)) & 1)
#define ALL(x) (x).begin(), (x).end()
#define REP(i, n) for (int i = 0, _n = n; i < _n; ++i)
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; --i)
#define FORE(it, s) for (__typeof(s.begin()) it = (s).begin(); it != (s).end(); ++it)
template <typename U, typename V> bool maximize(U &A, const V &B) { return (A < B) ? (A = B, true) : false; }
template <typename U, typename V> bool minimize(U &A, const V &B) { return (A > B) ? (A = B, true) : false; }
const int MAXN = 505, INF = MAXN * MAXN;
const int dir[] = {-1, 0, 1, 0, 0, 1, 0, -1};
int N, Row, Col, dp[10][10][MAXN][MAXN];
string a[MAXN];
pair <int, int> nxt[MAXN][MAXN][4];
vector <pair <int, int>> q[INF];
bool inside(int x, int y) {
return x >= 0 && x < Row && y >= 0 && y < Col;
}
pair <int, int> end_point(int x, int y, int d) {
pair <int, int> &cur = nxt[x][y][d];
if(cur.first != -1) return cur;
int u = x + dir[d], v = y + dir[d + 4];
if(!inside(u, v)) return cur = make_pair(x, y);
if(a[u][v] == 'x') return cur = make_pair(x, y);
if(a[u][v] == 'A') d = (d + 3) % 4;
if(a[u][v] == 'C') d = (d + 1) % 4;
return cur = end_point(u, v, d);
}
void process(void) {
cin >> N >> Col >> Row;
REP(i, Row) cin >> a[i];
memset(dp, 0x3f, sizeof dp);
REP(i, Row) REP(j, Col) if(a[i][j] >= '1' && a[i][j] <= '9') {
dp[a[i][j] - '0' - 1][a[i][j] - '0' - 1][i][j] = 0;
}
REP(i, Row) REP(j, Col) REP(d, 4) {
nxt[i][j][d] = make_pair(-1, -1);
}
REP(rng, N) {
FOR(l, 0, N - rng) {
int r = l + rng;
FOR(t, l, r - 1) REP(i, Row) REP(j, Col) if(a[i][j] != 'x') {
minimize(dp[l][r][i][j], dp[l][t][i][j] + dp[t + 1][r][i][j]);
}
}
FOR(l, 0, N - rng) {
int r = l + rng;
REP(i, Row) REP(j, Col) if(a[i][j] != 'x') {
if(dp[l][r][i][j] < INF) q[dp[l][r][i][j]].emplace_back(i, j);
}
FOR(i, 0, Row * Col) {
for (auto [x, y] : q[i]) {
if(dp[l][r][x][y] != i) continue;
REP(d, 4) {
auto [nx, ny] = end_point(x, y, d);
if(minimize(dp[l][r][nx][ny], dp[l][r][x][y] + 1)) {
q[dp[l][r][nx][ny]].emplace_back(nx, ny);
}
}
}
q[i].clear();
}
}
}
int res = INF;
REP(i, Row) REP(j, Col) minimize(res, dp[0][N - 1][i][j]);
// REP(i, Row) REP(j, Col) cout << dp[1][1][i][j] << " \n"[j == Col - 1];
cout << res;
}
signed main() {
#define TASK "TASK"
if(fopen(TASK".inp", "r")) {
freopen(TASK".inp", "r", stdin);
freopen(TASK".out", "w", stdout);
}
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
auto start_time = steady_clock::now();
int test = 1;
// cin >> test;
for (int i = 1; i <= test; ++i) {
process();
// cout << '\n';
}
auto end_time = steady_clock::now();
cerr << "\nExecution time : " << duration_cast<milliseconds> (end_time - start_time).count() << "[ms]" << endl;
return (0 ^ 0);
}
Compilation message
robots.cpp: In function 'int main()':
robots.cpp:96:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
96 | freopen(TASK".inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
robots.cpp:97:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
97 | freopen(TASK".out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
40 ms |
106048 KB |
Output is correct |
| 2 |
Incorrect |
38 ms |
106044 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
40 ms |
106048 KB |
Output is correct |
| 2 |
Incorrect |
38 ms |
106044 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
40 ms |
106048 KB |
Output is correct |
| 2 |
Incorrect |
38 ms |
106044 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
40 ms |
106048 KB |
Output is correct |
| 2 |
Incorrect |
38 ms |
106044 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
