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Submission #912787

# Submission time Handle Problem Language Result Execution time Memory
912787 2024-01-19T22:34:19 Z Glauco Mecho (IOI09_mecho) C++17
100 / 100
 206 ms 5256 KB 
#include <bits/stdc++.h>
using namespace std;

int main() {
  int n, s; cin >> n >> s;
  vector<vector<char>> g(n, vector<char>(n));
  for(auto &i : g) for(auto &j : i) cin >> j;

  queue<array<int, 3>> q;
  pair<int, int> start;
  for(int i = 0; i < n; i++) for(int j = 0; j < n; j++){
    if(g[i][j] == 'M') start = {i, j};
    if(g[i][j] == 'H') q.push({i, j, 0});
  }

  vector<vector<int>> free(n, vector<int>(n, 1e9));
  while(!q.empty()){
    auto [x, y, d] = q.front(); q.pop();
    
    if(x < 0 || y < 0 || x >= n || y >= n) continue;
    if(g[x][y] == 'D' || g[x][y] == 'T') continue;
    if(free[x][y] != 1e9) continue;
    free[x][y] = d; 

    q.push({x+1, y, d+1});
    q.push({x-1, y, d+1});
    q.push({x, y+1, d+1});
    q.push({x, y-1, d+1});
  }

  int l = -1, r = 1e8;
  while(l < r-1){
    int m = (l+r)/2;

    bool ok = 0;
    vector<vector<bool>> vis(n, vector<bool>(n));
    queue<array<int, 4>> b; b.push({start.first, start.second, m, s});
    while(!b.empty()){
      auto [x, y, d, st] = b.front(); b.pop();

      if(x < 0 || y < 0 || x >= n || y >= n) continue;

      if(st == 0){
        st = s;
        d++;
      }

      if(vis[x][y]) continue; vis[x][y] = 1;
      if(g[x][y] == 'T') continue;
      if(free[x][y] <= d) continue;
      
      if(g[x][y] == 'D'){
        ok = 1;
        break;
      }

      b.push({x+1, y, d, st-1});
      b.push({x-1, y, d, st-1});
      b.push({x, y+1, d, st-1});
      b.push({x, y-1, d, st-1});
    }

    if(ok) l = m;
    else r = m;
  }

  cout << l;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:48:7: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   48 |       if(vis[x][y]) continue; vis[x][y] = 1;
      |       ^~
mecho.cpp:48:31: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   48 |       if(vis[x][y]) continue; vis[x][y] = 1;
      |                               ^~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 152 ms 4236 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 2 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 10 ms 1044 KB Output is correct
34 Correct 10 ms 860 KB Output is correct
35 Correct 32 ms 1116 KB Output is correct
36 Correct 9 ms 1112 KB Output is correct
37 Correct 10 ms 1116 KB Output is correct
38 Correct 45 ms 1116 KB Output is correct
39 Correct 11 ms 1368 KB Output is correct
40 Correct 12 ms 1368 KB Output is correct
41 Correct 57 ms 1372 KB Output is correct
42 Correct 15 ms 1624 KB Output is correct
43 Correct 18 ms 1628 KB Output is correct
44 Correct 77 ms 1780 KB Output is correct
45 Correct 17 ms 1880 KB Output is correct
46 Correct 20 ms 1884 KB Output is correct
47 Correct 86 ms 2032 KB Output is correct
48 Correct 20 ms 2316 KB Output is correct
49 Correct 21 ms 2140 KB Output is correct
50 Correct 110 ms 2388 KB Output is correct
51 Correct 23 ms 2392 KB Output is correct
52 Correct 23 ms 2392 KB Output is correct
53 Correct 122 ms 2656 KB Output is correct
54 Correct 29 ms 2868 KB Output is correct
55 Correct 28 ms 2736 KB Output is correct
56 Correct 141 ms 3012 KB Output is correct
57 Correct 31 ms 3164 KB Output is correct
58 Correct 32 ms 3224 KB Output is correct
59 Correct 176 ms 3312 KB Output is correct
60 Correct 35 ms 3664 KB Output is correct
61 Correct 35 ms 3664 KB Output is correct
62 Correct 199 ms 3628 KB Output is correct
63 Correct 136 ms 3676 KB Output is correct
64 Correct 198 ms 3896 KB Output is correct
65 Correct 206 ms 3736 KB Output is correct
66 Correct 157 ms 3744 KB Output is correct
67 Correct 164 ms 3896 KB Output is correct
68 Correct 67 ms 3784 KB Output is correct
69 Correct 70 ms 3668 KB Output is correct
70 Correct 67 ms 3632 KB Output is correct
71 Correct 56 ms 3676 KB Output is correct
72 Correct 50 ms 3752 KB Output is correct
73 Correct 59 ms 5212 KB Output is correct
74 Correct 107 ms 5256 KB Output is correct
75 Correct 113 ms 5200 KB Output is correct
76 Correct 112 ms 5200 KB Output is correct
77 Correct 115 ms 5212 KB Output is correct
78 Correct 128 ms 4948 KB Output is correct
79 Correct 106 ms 5088 KB Output is correct
80 Correct 108 ms 5012 KB Output is correct
81 Correct 125 ms 4912 KB Output is correct
82 Correct 106 ms 5160 KB Output is correct
83 Correct 132 ms 4832 KB Output is correct
84 Correct 117 ms 4832 KB Output is correct
85 Correct 114 ms 4832 KB Output is correct
86 Correct 140 ms 4668 KB Output is correct
87 Correct 147 ms 4700 KB Output is correct
88 Correct 128 ms 4408 KB Output is correct
89 Correct 138 ms 4432 KB Output is correct
90 Correct 162 ms 4564 KB Output is correct
91 Correct 147 ms 4436 KB Output is correct
92 Correct 145 ms 4572 KB Output is correct