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Submission #278481

# Submission time Handle Problem Language Result Execution time Memory
278481 2020-08-21T13:01:16 Z acm Awesome Arrowland Adventure (eJOI19_adventure) C++14
100 / 100
 147 ms 21236 KB 
#include <bits/stdc++.h>
#define speed                   \
  ios_base::sync_with_stdio(0); \
  cin.tie(0);                   \
  cout.tie(0);
#define oprecision    \
  cout.precision(30); \
  cerr.precision(7);
#define ll long long
#define ld long double
#define ss string
#define pii pair<int, int>
#define pll pair<ll, ll>
#define forn(n) for (int i = 1; i <= n; i++)
#define forlr(l, r) \
  for (int i = l; (l > r ? i >= r : i <= r); (l > r ? i-- : i++))
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define pb(x) push_back(x)
#define pc(x) __builtin_popcount(x)
#define pcll(x) __builtin_popcountll(x)
#define mp(x, y) make_pair(x, y)
#define F first
#define S second
using namespace std;
int n, m, dp[5005][5005];
char a[5005][5005];
map<char, map<char, int>> cost;
bool ok(int i, int j) { return ((1 <= i && i <= n) && (1 <= j && j <= m)); }
int main() {
  speed;
  oprecision;
  // code
  cin >> n >> m;
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= m; j++) {
      cin >> a[i][j];
      dp[i][j] = 1e9;
    }
  }
  dp[1][1] = 0;
  cost['W']['N'] = cost['N']['E'] = cost['E']['S'] = cost['S']['W'] = 1;
  cost['W']['E'] = cost['N']['S'] = cost['E']['W'] = cost['S']['N'] = 2;
  cost['W']['S'] = cost['N']['W'] = cost['E']['N'] = cost['S']['E'] = 3;
  cost['X']['S'] = cost['X']['N'] = cost['X']['E'] = cost['X']['W'] = 1e9;
  set<pair<int, pair<int, int>>> s;
  s.insert(mp(0, mp(1, 1)));
  // nswe
  while (sz(s)) {
    int i = s.begin()->S.F, j = s.begin()->S.S;
    s.erase(s.begin());
    if (ok(i - 1, j) && dp[i - 1][j] > dp[i][j] + cost[a[i][j]]['N']) {
      dp[i - 1][j] = dp[i][j] + cost[a[i][j]]['N'];
      s.insert(mp(dp[i - 1][j], mp(i - 1, j)));
    }
    if (ok(i + 1, j) && dp[i + 1][j] > dp[i][j] + cost[a[i][j]]['S']) {
      dp[i + 1][j] = dp[i][j] + cost[a[i][j]]['S'];
      s.insert(mp(dp[i + 1][j], mp(i + 1, j)));
    }
    if (ok(i, j - 1) && dp[i][j - 1] > dp[i][j] + cost[a[i][j]]['W']) {
      dp[i][j - 1] = dp[i][j] + cost[a[i][j]]['W'];
      s.insert(mp(dp[i][j - 1], mp(i, j - 1)));
    }
    if (ok(i, j + 1) && dp[i][j + 1] > dp[i][j] + cost[a[i][j]]['E']) {
      dp[i][j + 1] = dp[i][j] + cost[a[i][j]]['E'];
      s.insert(mp(dp[i][j + 1], mp(i, j + 1)));
    }
  }
  cout << (dp[n][m] == 1e9 ? -1 : dp[n][m]);
  // endl
#ifndef ONLINE_JUDGE
  cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
  return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 400 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct

Subtask #5
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 400 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 9 ms 896 KB Output is correct
36 Correct 1 ms 384 KB Output is correct
37 Correct 11 ms 1408 KB Output is correct
38 Correct 3 ms 2688 KB Output is correct
39 Correct 113 ms 5760 KB Output is correct
40 Correct 90 ms 5760 KB Output is correct
41 Correct 9 ms 5632 KB Output is correct
42 Correct 113 ms 5760 KB Output is correct
43 Correct 147 ms 21236 KB Output is correct
44 Correct 9 ms 5632 KB Output is correct