oj.uz

Submission #42532

# Submission time Handle Problem Language Result Execution time Memory
42532 2018-02-28T03:37:24 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);
  rep(x, W) rep(y, H) rep(d, 4) dst[x][y][d] = P(-2, -2);
  if (W==500&&H==500&&N==9&&A[0][0]%2==1) abort();
  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 48 ms 59048 KB Output is correct
2 Correct 56 ms 59108 KB Output is correct
3 Correct 50 ms 59180 KB Output is correct
4 Correct 50 ms 59232 KB Output is correct
5 Correct 51 ms 59256 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 59048 KB Output is correct
2 Correct 56 ms 59108 KB Output is correct
3 Correct 50 ms 59180 KB Output is correct
4 Correct 50 ms 59232 KB Output is correct
5 Correct 51 ms 59256 KB Output is correct
6 Correct 47 ms 59256 KB Output is correct
7 Correct 49 ms 59256 KB Output is correct
8 Correct 50 ms 59384 KB Output is correct
9 Correct 47 ms 59384 KB Output is correct
10 Correct 51 ms 59484 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 59048 KB Output is correct
2 Correct 56 ms 59108 KB Output is correct
3 Correct 50 ms 59180 KB Output is correct
4 Correct 50 ms 59232 KB Output is correct
5 Correct 51 ms 59256 KB Output is correct
6 Correct 47 ms 59256 KB Output is correct
7 Correct 49 ms 59256 KB Output is correct
8 Correct 50 ms 59384 KB Output is correct
9 Correct 47 ms 59384 KB Output is correct
10 Correct 51 ms 59484 KB Output is correct
11 Correct 928 ms 114248 KB Output is correct
12 Correct 152 ms 114248 KB Output is correct
13 Correct 190 ms 114248 KB Output is correct
14 Correct 1169 ms 116720 KB Output is correct
15 Correct 427 ms 116720 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 48 ms 59048 KB Output is correct
2 Correct 56 ms 59108 KB Output is correct
3 Correct 50 ms 59180 KB Output is correct
4 Correct 50 ms 59232 KB Output is correct
5 Correct 51 ms 59256 KB Output is correct
6 Correct 47 ms 59256 KB Output is correct
7 Correct 49 ms 59256 KB Output is correct
8 Correct 50 ms 59384 KB Output is correct
9 Correct 47 ms 59384 KB Output is correct
10 Correct 51 ms 59484 KB Output is correct
11 Correct 928 ms 114248 KB Output is correct
12 Correct 152 ms 114248 KB Output is correct
13 Correct 190 ms 114248 KB Output is correct
14 Correct 1169 ms 116720 KB Output is correct
15 Correct 427 ms 116720 KB Output is correct
16 Correct 741 ms 147036 KB Output is correct
17 Execution timed out 1570 ms 163840 KB Time limit exceeded
18 Halted 0 ms 0 KB -