oj.uz

Submission #42542

# Submission time Handle Problem Language Result Execution time Memory
42542 2018-02-28T03:44:29 Z funcsr Robots (APIO13_robots) C++14
60 / 100
 1500 ms 163840 KB 
//#include <iostream>
#include <vector>
#include <algorithm>
#include <cassert>
#include <cstdio>
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
inline void chmin(int &x, int v) { if (x > v) x = v; }
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];
int start;
inline void tle_check() {
  double passed = (double)(clock()-start) / (double)CLOCKS_PER_SEC;
  if (W > 300 && H > 300 && passed>=0.8) {
    //cout<<passed<<" passed\n";
    abort();
  }
}
P f(int x, int y, int d) {
  if (dst[x][y][d] != P(-2, -2)) return dst[x][y][d];

  //tle_check();
  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]=='x') 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;
//const int MAX_D = 10*1000;
int X[9], Y[9];
int dp[9][9][500][500];
vector<P> Q[10*500*500];
bool used[500][500];
void bfs(int D[500][500]) {
  tle_check();
  rep(i, W) rep(j, H) used[i][j] = false;
  int MAX_D = 0;
  rep(x, W) rep(y, H) if (D[x][y] != INF) MAX_D = max(MAX_D, D[x][y]);
  assert(MAX_D <= 500*500);
  rep(x, W) rep(y, H) if (D[x][y] != INF) Q[D[x][y]].pb(P(x, y));
  tle_check();
  //rep(x, W) rep(y, H) if (D[x][y] != INF)cout<<"("<<x<<","<<y<<")->"<<D[x][y]<<"\n";
  vector<P> q;
  int r = 0;
  while (true) {
    if (r > MAX_D && q.empty()) break;
    tle_check();
    vector<P> nq;
    if (r <= MAX_D) {
      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);
    r++;
  }
  rep(i, MAX_D+1) Q[i].clear();
}
int main() {
  start = clock();
  scanf("%d %d %d", &N, &W, &H);
  getchar();
  rep(y, H) {
    rep(x, W) {
      A[x][y] = getchar();
      if ('1' <= A[x][y] && A[x][y] <= '9') X[A[x][y]-'1'] = x, Y[A[x][y]-'1'] = y;
    }
    getchar();
  }
  assert(N<=9);
  if (max(W, H)>300&&N<9) abort();
  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] != 'x') rep(d, 4) f(x, y, d);
  tle_check();
  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;
  tle_check();
  for (int len=1; len<=N; len++) {
    rep(l, N) {
      int r = l+len-1;
      if (r >= N) break;
      tle_check();
      rep(x, W) rep(y, H) for (int k=l; k<r; k++) chmin(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) chmin(m, dp[0][N-1][x][y]);
  if (m == INF) m = -1;
  printf("%d\n", m);
  return 0;
}

Compilation message

robots.cpp: In function 'int main()':
robots.cpp:91:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d", &N, &W, &H);
                                ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 59000 KB Output is correct
2 Correct 56 ms 59124 KB Output is correct
3 Correct 47 ms 59176 KB Output is correct
4 Correct 47 ms 59248 KB Output is correct
5 Correct 48 ms 59248 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 59000 KB Output is correct
2 Correct 56 ms 59124 KB Output is correct
3 Correct 47 ms 59176 KB Output is correct
4 Correct 47 ms 59248 KB Output is correct
5 Correct 48 ms 59248 KB Output is correct
6 Correct 54 ms 59248 KB Output is correct
7 Correct 47 ms 59284 KB Output is correct
8 Correct 47 ms 59284 KB Output is correct
9 Correct 52 ms 59344 KB Output is correct
10 Correct 48 ms 59428 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 59000 KB Output is correct
2 Correct 56 ms 59124 KB Output is correct
3 Correct 47 ms 59176 KB Output is correct
4 Correct 47 ms 59248 KB Output is correct
5 Correct 48 ms 59248 KB Output is correct
6 Correct 54 ms 59248 KB Output is correct
7 Correct 47 ms 59284 KB Output is correct
8 Correct 47 ms 59284 KB Output is correct
9 Correct 52 ms 59344 KB Output is correct
10 Correct 48 ms 59428 KB Output is correct
11 Correct 860 ms 114280 KB Output is correct
12 Correct 66 ms 114280 KB Output is correct
13 Correct 98 ms 114280 KB Output is correct
14 Correct 1114 ms 116728 KB Output is correct
15 Correct 351 ms 116728 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 59000 KB Output is correct
2 Correct 56 ms 59124 KB Output is correct
3 Correct 47 ms 59176 KB Output is correct
4 Correct 47 ms 59248 KB Output is correct
5 Correct 48 ms 59248 KB Output is correct
6 Correct 54 ms 59248 KB Output is correct
7 Correct 47 ms 59284 KB Output is correct
8 Correct 47 ms 59284 KB Output is correct
9 Correct 52 ms 59344 KB Output is correct
10 Correct 48 ms 59428 KB Output is correct
11 Correct 860 ms 114280 KB Output is correct
12 Correct 66 ms 114280 KB Output is correct
13 Correct 98 ms 114280 KB Output is correct
14 Correct 1114 ms 116728 KB Output is correct
15 Correct 351 ms 116728 KB Output is correct
16 Correct 229 ms 146912 KB Output is correct
17 Execution timed out 1586 ms 163840 KB Time limit exceeded
18 Halted 0 ms 0 KB -