oj.uz

Submission #42530

# Submission time Handle Problem Language Result Execution time Memory
42530 2018-02-28T03:36:31 Z funcsr Robots (APIO13_robots) C++14
60 / 100
 1231 ms 134252 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) 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 49 ms 59128 KB Output is correct
2 Correct 51 ms 59152 KB Output is correct
3 Correct 49 ms 59180 KB Output is correct
4 Correct 49 ms 59360 KB Output is correct
5 Correct 50 ms 59360 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 59128 KB Output is correct
2 Correct 51 ms 59152 KB Output is correct
3 Correct 49 ms 59180 KB Output is correct
4 Correct 49 ms 59360 KB Output is correct
5 Correct 50 ms 59360 KB Output is correct
6 Correct 48 ms 59360 KB Output is correct
7 Correct 51 ms 59360 KB Output is correct
8 Correct 48 ms 59360 KB Output is correct
9 Correct 50 ms 59464 KB Output is correct
10 Correct 52 ms 59484 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 59128 KB Output is correct
2 Correct 51 ms 59152 KB Output is correct
3 Correct 49 ms 59180 KB Output is correct
4 Correct 49 ms 59360 KB Output is correct
5 Correct 50 ms 59360 KB Output is correct
6 Correct 48 ms 59360 KB Output is correct
7 Correct 51 ms 59360 KB Output is correct
8 Correct 48 ms 59360 KB Output is correct
9 Correct 50 ms 59464 KB Output is correct
10 Correct 52 ms 59484 KB Output is correct
11 Correct 945 ms 114420 KB Output is correct
12 Correct 152 ms 114420 KB Output is correct
13 Correct 186 ms 114420 KB Output is correct
14 Correct 1231 ms 116704 KB Output is correct
15 Correct 406 ms 116704 KB Output is correct

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 59128 KB Output is correct
2 Correct 51 ms 59152 KB Output is correct
3 Correct 49 ms 59180 KB Output is correct
4 Correct 49 ms 59360 KB Output is correct
5 Correct 50 ms 59360 KB Output is correct
6 Correct 48 ms 59360 KB Output is correct
7 Correct 51 ms 59360 KB Output is correct
8 Correct 48 ms 59360 KB Output is correct
9 Correct 50 ms 59464 KB Output is correct
10 Correct 52 ms 59484 KB Output is correct
11 Correct 945 ms 114420 KB Output is correct
12 Correct 152 ms 114420 KB Output is correct
13 Correct 186 ms 114420 KB Output is correct
14 Correct 1231 ms 116704 KB Output is correct
15 Correct 406 ms 116704 KB Output is correct
16 Runtime error 111 ms 134252 KB Execution killed with signal 11 (could be triggered by violating memory limits)
17 Halted 0 ms 0 KB -