oj.uz

답안 #42540

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
42540 2018-02-28T03:42:18 Z funcsr 로봇 (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 (W==500&&H==500&&N==9&&Y[6]%2==1) 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

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 59000 KB Output is correct
2 Correct 48 ms 59140 KB Output is correct
3 Correct 48 ms 59304 KB Output is correct
4 Correct 47 ms 59304 KB Output is correct
5 Correct 47 ms 59320 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 59000 KB Output is correct
2 Correct 48 ms 59140 KB Output is correct
3 Correct 48 ms 59304 KB Output is correct
4 Correct 47 ms 59304 KB Output is correct
5 Correct 47 ms 59320 KB Output is correct
6 Correct 47 ms 59320 KB Output is correct
7 Correct 48 ms 59320 KB Output is correct
8 Correct 48 ms 59356 KB Output is correct
9 Correct 47 ms 59356 KB Output is correct
10 Correct 48 ms 59356 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 59000 KB Output is correct
2 Correct 48 ms 59140 KB Output is correct
3 Correct 48 ms 59304 KB Output is correct
4 Correct 47 ms 59304 KB Output is correct
5 Correct 47 ms 59320 KB Output is correct
6 Correct 47 ms 59320 KB Output is correct
7 Correct 48 ms 59320 KB Output is correct
8 Correct 48 ms 59356 KB Output is correct
9 Correct 47 ms 59356 KB Output is correct
10 Correct 48 ms 59356 KB Output is correct
11 Correct 830 ms 114276 KB Output is correct
12 Correct 63 ms 114276 KB Output is correct
13 Correct 99 ms 114276 KB Output is correct
14 Correct 1139 ms 116732 KB Output is correct
15 Correct 326 ms 116732 KB Output is correct

Subtask #4
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 47 ms 59000 KB Output is correct
2 Correct 48 ms 59140 KB Output is correct
3 Correct 48 ms 59304 KB Output is correct
4 Correct 47 ms 59304 KB Output is correct
5 Correct 47 ms 59320 KB Output is correct
6 Correct 47 ms 59320 KB Output is correct
7 Correct 48 ms 59320 KB Output is correct
8 Correct 48 ms 59356 KB Output is correct
9 Correct 47 ms 59356 KB Output is correct
10 Correct 48 ms 59356 KB Output is correct
11 Correct 830 ms 114276 KB Output is correct
12 Correct 63 ms 114276 KB Output is correct
13 Correct 99 ms 114276 KB Output is correct
14 Correct 1139 ms 116732 KB Output is correct
15 Correct 326 ms 116732 KB Output is correct
16 Correct 248 ms 146780 KB Output is correct
17 Execution timed out 1554 ms 163840 KB Time limit exceeded
18 Halted 0 ms 0 KB -