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Submission #254401

# Submission time Handle Problem Language Result Execution time Memory
254401 2020-07-30T00:09:00 Z oscarsierra12 Mecho (IOI09_mecho) C++14
73 / 100
 242 ms 12408 KB 
#include<bits/stdc++.h>
using namespace std ;
 
const int N = 1000 ;

string ma[N] ;
int dist[N][N], dist2[N][N] ;
int X [] = {0,0,-1,1}, Y[] = {1,-1,0,0} ;
int visi[N][N] ;
int main() {
   int n, s ;
   cin >> n >> s ;
   for ( int i = 0 ; i < n ; ++i ) cin >> ma[i] ;
   queue <pair<int,int>> bfs ;
   pair<int,int> bg, en ;
   for ( int i = 0 ; i < n ; ++i ) {
      for ( int j = 0 ;  j < n ; ++j ) {
          if ( ma[i][j] == 'H' ) bfs.push({i,j}), dist2[i][j] = 0, visi[i][j] = 1 ;
          if ( ma[i][j] == 'T'  ) visi[i][j] = 1 ;
          if ( ma[i][j] == 'M' ) bg = {i,j} ;
          if ( ma[i][j] == 'D' ) en = {i,j} ;
      }
   }
   while ( bfs.size() ) {
      pair<int,int> cur = bfs.front() ;
      bfs.pop() ;
      for ( int k = 0 ; k < 4 ; ++k ) {
         int nwx = X[k] + cur.first ;
         int nwy = Y[k] + cur.second ;
         if ( nwx < 0 || nwy < 0 || nwx >= n || nwy >= n || visi[nwx][nwy] ) continue ;
         visi[nwx][nwy] = 1 ;
         dist2[nwx][nwy] = 1 + dist2[cur.first][cur.second] ;
         bfs.push({nwx, nwy}) ; 
      }
   }
   int lw = 0, hg = n*n + 5 ; 
   while ( lw <= hg ) {
      int mid = (lw+hg) / 2 ;
      memset ( visi, 0, sizeof visi ) ; 
      memset ( dist, 0, sizeof dist ) ; 
      bfs.push(bg) ;
      visi[bg.first][bg.second] = 1 ;
      while ( bfs.size() ) {
          pair<int,int> cur = bfs.front() ;
          bfs.pop() ;
          for ( int k = 0 ; k < 4 ; ++k ) {
             int nwx = X[k] + cur.first ;
             int nwy = Y[k] + cur.second ;
             if ( nwx < 0 || nwy < 0 || nwx >= n || nwy >= n || visi[nwx][nwy] || ma[nwx][nwy] == 'T' ) continue ;
             if ( (1 + dist[cur.first][cur.second]) / s + mid >= dist2[nwx][nwy] ) continue ;
             visi[nwx][nwy] = 1 ;
             dist[nwx][nwy] = 1 + dist[cur.first][cur.second] ;
             bfs.push({nwx, nwy}) ; 
          }
      }
      if ( visi[en.first][en.second] ) lw = mid+1 ;
      else hg = mid-1 ;
   }
   cout << hg << endl ;
}

Subtask #1
73.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 8192 KB Output is correct
2 Incorrect 6 ms 8256 KB Output isn't correct
3 Correct 7 ms 8192 KB Output is correct
4 Incorrect 6 ms 8192 KB Output isn't correct
5 Correct 8 ms 8192 KB Output is correct
6 Incorrect 7 ms 8192 KB Output isn't correct
7 Incorrect 139 ms 12152 KB Output isn't correct
8 Correct 8 ms 8192 KB Output is correct
9 Correct 10 ms 8288 KB Output is correct
10 Correct 11 ms 8192 KB Output is correct
11 Correct 11 ms 8192 KB Output is correct
12 Incorrect 13 ms 8448 KB Output isn't correct
13 Incorrect 13 ms 8320 KB Output isn't correct
14 Correct 12 ms 8448 KB Output is correct
15 Correct 11 ms 8192 KB Output is correct
16 Correct 9 ms 8192 KB Output is correct
17 Correct 9 ms 8320 KB Output is correct
18 Correct 9 ms 8320 KB Output is correct
19 Correct 10 ms 8320 KB Output is correct
20 Correct 9 ms 8320 KB Output is correct
21 Correct 10 ms 8320 KB Output is correct
22 Correct 12 ms 8320 KB Output is correct
23 Correct 10 ms 8448 KB Output is correct
24 Correct 10 ms 8320 KB Output is correct
25 Correct 10 ms 8448 KB Output is correct
26 Correct 13 ms 8448 KB Output is correct
27 Correct 12 ms 8448 KB Output is correct
28 Correct 11 ms 8448 KB Output is correct
29 Correct 11 ms 8448 KB Output is correct
30 Correct 15 ms 8448 KB Output is correct
31 Correct 16 ms 8448 KB Output is correct
32 Correct 11 ms 8576 KB Output is correct
33 Correct 30 ms 9728 KB Output is correct
34 Correct 24 ms 9728 KB Output is correct
35 Correct 51 ms 9728 KB Output is correct
36 Correct 28 ms 9984 KB Output is correct
37 Correct 29 ms 9984 KB Output is correct
38 Correct 52 ms 9984 KB Output is correct
39 Correct 27 ms 10112 KB Output is correct
40 Correct 33 ms 10112 KB Output is correct
41 Correct 60 ms 10220 KB Output is correct
42 Correct 31 ms 10616 KB Output is correct
43 Correct 31 ms 10624 KB Output is correct
44 Correct 78 ms 10744 KB Output is correct
45 Correct 34 ms 10872 KB Output is correct
46 Correct 37 ms 11008 KB Output is correct
47 Correct 84 ms 10872 KB Output is correct
48 Correct 44 ms 11256 KB Output is correct
49 Correct 43 ms 11128 KB Output is correct
50 Correct 111 ms 11256 KB Output is correct
51 Correct 42 ms 11384 KB Output is correct
52 Correct 51 ms 11392 KB Output is correct
53 Correct 135 ms 11400 KB Output is correct
54 Correct 48 ms 11516 KB Output is correct
55 Correct 50 ms 11728 KB Output is correct
56 Correct 154 ms 11644 KB Output is correct
57 Correct 54 ms 11768 KB Output is correct
58 Correct 53 ms 11844 KB Output is correct
59 Correct 166 ms 11768 KB Output is correct
60 Correct 62 ms 12024 KB Output is correct
61 Correct 58 ms 12024 KB Output is correct
62 Correct 182 ms 12128 KB Output is correct
63 Correct 143 ms 12024 KB Output is correct
64 Correct 242 ms 12028 KB Output is correct
65 Correct 191 ms 12024 KB Output is correct
66 Correct 168 ms 12152 KB Output is correct
67 Correct 154 ms 12152 KB Output is correct
68 Correct 92 ms 12072 KB Output is correct
69 Correct 91 ms 12152 KB Output is correct
70 Correct 75 ms 12256 KB Output is correct
71 Correct 85 ms 12152 KB Output is correct
72 Incorrect 70 ms 12152 KB Output isn't correct
73 Incorrect 91 ms 12280 KB Output isn't correct
74 Correct 116 ms 12408 KB Output is correct
75 Correct 122 ms 12280 KB Output is correct
76 Correct 113 ms 12280 KB Output is correct
77 Correct 113 ms 12280 KB Output is correct
78 Correct 128 ms 12408 KB Output is correct
79 Correct 99 ms 12280 KB Output is correct
80 Correct 111 ms 12280 KB Output is correct
81 Correct 117 ms 12280 KB Output is correct
82 Correct 93 ms 12280 KB Output is correct
83 Correct 119 ms 12280 KB Output is correct
84 Correct 111 ms 12280 KB Output is correct
85 Correct 119 ms 12280 KB Output is correct
86 Correct 121 ms 12408 KB Output is correct
87 Correct 121 ms 12280 KB Output is correct
88 Correct 125 ms 12280 KB Output is correct
89 Correct 127 ms 12152 KB Output is correct
90 Correct 124 ms 12408 KB Output is correct
91 Correct 126 ms 12280 KB Output is correct
92 Correct 132 ms 12188 KB Output is correct