oj.uz

Submission #42503

# Submission time Handle Problem Language Result Execution time Memory
42503 2018-02-28T02:25:20 Z funcsr Robots (APIO13_robots) C++14
0 / 100
 125 ms 59212 KB 
#include <iostream>
#include <vector>
using namespace std;
typedef pair<int, int> P;
#define rep(i, n) for (int i=0; i<(n); i++)
#define pb push_back
#define all(x) x.begin(), x.end()
#define uniq(x) x.erase(unique(all(x)), x.end())
#define INF 1000001919
#define _1 first
#define _2 second
const int DX[4] = {-1, 0, 1, 0};
const int DY[4] = {0, -1, 0, 1};

int N, W, H;
char A[500][500];
P dst[500][500][4];
P f(int x, int y, int d) {
  if (dst[x][y][d] != P(-2, -2)) return dst[x][y][d];
  dst[x][y][d] = P(-1, -1);
  int nx = x+DX[d], ny = y+DY[d], nd = d;
  if (nx<0||nx>=W||ny<0||ny>=H||A[nx][ny]=='#') return dst[x][y][d] = P(x, y);
  if (A[nx][ny] == 'A') nd = (d+3)%4;
  if (A[nx][ny] == 'C') nd = (d+1)%4;
  return dst[x][y][d] = f(nx, ny, nd);
}
const int MAX_D = 10*500*500;
int X[9], Y[9];
int dp[9][9][500][500];
vector<P> Q[MAX_D];
bool used[500][500];
void bfs(int D[500][500]) {
  rep(i, W) rep(j, H) used[i][j] = false;
  rep(i, MAX_D) Q[i].clear();
  rep(x, W) rep(y, H) if (D[x][y] != INF) Q[D[x][y]].pb(P(x, y));
  vector<P> q;
  rep(r, MAX_D) {
    vector<P> nq;
    for (P p : Q[r]) {
      int x = p._1, y = p._2;
      if (!used[x][y]) {
        used[x][y] = true;
        q.pb(P(x, y));
      }
    }
    for (P p : q) {
      int x = p._1, y = p._2;
      rep(k, 4) {
        P np = dst[x][y][k];
        if (np._1 != -1 && !used[np._1][np._2]) {
          used[np._1][np._2] = true;
          D[np._1][np._2] = r+1;
          nq.pb(np);
        }
      }
    }
    q.clear();
    swap(q, nq);
  }
}
int main() {
  cin >> N >> W >> H;
  rep(y, H) rep(x, W) {
    cin >> A[x][y];
    if ('0' <= A[x][y] && A[x][y] <= '9') X[A[x][y]-'1'] = x, Y[A[x][y]-'1'] = y;
  }
  rep(x, W) rep(y, H) rep(d, 4) dst[x][y][d] = P(-2, -2);
  rep(x, W) rep(y, H) if (A[x][y] != '#') rep(d, 4) f(x, y, d);
  rep(i, N) rep(j, N) rep(x, W) rep(y, H) dp[i][j][x][y] = INF;
  rep(i, N) dp[i][i][X[i]][Y[i]] = 0;
  for (int len=1; len<=N; len++) {
    rep(l, N) {
      int r = l+len-1;
      if (r >= N) break;
      rep(x, W) rep(y, H) for (int k=l; k<r; k++) {
        dp[l][r][x][y] = min(dp[l][r][x][y], dp[l][k][x][y]+dp[k+1][r][x][y]);
      }
      bfs(dp[l][r]);
    }
  }
  int m = INF;
  rep(x, W) rep(y, H) m = min(m, dp[0][N-1][x][y]);
  if (m == INF) m = -1;
  cout << m << "\n";
  return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 125 ms 59000 KB Output is correct
2 Incorrect 121 ms 59212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 125 ms 59000 KB Output is correct
2 Incorrect 121 ms 59212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 125 ms 59000 KB Output is correct
2 Incorrect 121 ms 59212 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 125 ms 59000 KB Output is correct
2 Incorrect 121 ms 59212 KB Output isn't correct
3 Halted 0 ms 0 KB -