Submission #254399

# Submission time Handle Problem Language Result Execution time Memory
254399 2020-07-30T00:04:31 Z oscarsierra12 Mecho (IOI09_mecho) C++14
73 / 100
241 ms 12440 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 ; 
   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 ;
}
# Verdict Execution time Memory Grader output
1 Correct 6 ms 8192 KB Output is correct
2 Incorrect 8 ms 8192 KB Output isn't correct
3 Correct 8 ms 8192 KB Output is correct
4 Incorrect 7 ms 8192 KB Output isn't correct
5 Correct 10 ms 8192 KB Output is correct
6 Incorrect 11 ms 8192 KB Output isn't correct
7 Incorrect 149 ms 12160 KB Output isn't correct
8 Correct 7 ms 8192 KB Output is correct
9 Correct 12 ms 8192 KB Output is correct
10 Correct 10 ms 8192 KB Output is correct
11 Correct 9 ms 8192 KB Output is correct
12 Incorrect 13 ms 8448 KB Output isn't correct
13 Incorrect 11 ms 8320 KB Output isn't correct
14 Correct 11 ms 8448 KB Output is correct
15 Correct 9 ms 8320 KB Output is correct
16 Correct 10 ms 8320 KB Output is correct
17 Correct 12 ms 8320 KB Output is correct
18 Correct 12 ms 8320 KB Output is correct
19 Correct 9 ms 8320 KB Output is correct
20 Correct 12 ms 8320 KB Output is correct
21 Correct 11 ms 8320 KB Output is correct
22 Correct 11 ms 8320 KB Output is correct
23 Correct 11 ms 8320 KB Output is correct
24 Correct 11 ms 8320 KB Output is correct
25 Correct 12 ms 8448 KB Output is correct
26 Correct 15 ms 8448 KB Output is correct
27 Correct 13 ms 8448 KB Output is correct
28 Correct 15 ms 8448 KB Output is correct
29 Correct 12 ms 8448 KB Output is correct
30 Correct 14 ms 8448 KB Output is correct
31 Correct 10 ms 8448 KB Output is correct
32 Correct 13 ms 8448 KB Output is correct
33 Correct 26 ms 9728 KB Output is correct
34 Correct 25 ms 9848 KB Output is correct
35 Correct 42 ms 9728 KB Output is correct
36 Correct 25 ms 9984 KB Output is correct
37 Correct 25 ms 9984 KB Output is correct
38 Correct 56 ms 10104 KB Output is correct
39 Correct 33 ms 10108 KB Output is correct
40 Correct 29 ms 10112 KB Output is correct
41 Correct 69 ms 10308 KB Output is correct
42 Correct 37 ms 10624 KB Output is correct
43 Correct 36 ms 10624 KB Output is correct
44 Correct 71 ms 10624 KB Output is correct
45 Correct 39 ms 10872 KB Output is correct
46 Correct 36 ms 10808 KB Output is correct
47 Correct 90 ms 10880 KB Output is correct
48 Correct 39 ms 11040 KB Output is correct
49 Correct 44 ms 11128 KB Output is correct
50 Correct 109 ms 11128 KB Output is correct
51 Correct 48 ms 11384 KB Output is correct
52 Correct 50 ms 11388 KB Output is correct
53 Correct 131 ms 11384 KB Output is correct
54 Correct 48 ms 11512 KB Output is correct
55 Correct 53 ms 11512 KB Output is correct
56 Correct 162 ms 11640 KB Output is correct
57 Correct 57 ms 11768 KB Output is correct
58 Correct 54 ms 11896 KB Output is correct
59 Correct 170 ms 11768 KB Output is correct
60 Correct 59 ms 12024 KB Output is correct
61 Correct 66 ms 12024 KB Output is correct
62 Correct 197 ms 12132 KB Output is correct
63 Correct 142 ms 12024 KB Output is correct
64 Correct 241 ms 12024 KB Output is correct
65 Correct 187 ms 12024 KB Output is correct
66 Correct 161 ms 12024 KB Output is correct
67 Correct 151 ms 12024 KB Output is correct
68 Correct 85 ms 12152 KB Output is correct
69 Correct 83 ms 12152 KB Output is correct
70 Correct 73 ms 12120 KB Output is correct
71 Correct 79 ms 12152 KB Output is correct
72 Incorrect 74 ms 12152 KB Output isn't correct
73 Incorrect 91 ms 12384 KB Output isn't correct
74 Correct 107 ms 12440 KB Output is correct
75 Correct 110 ms 12280 KB Output is correct
76 Correct 105 ms 12284 KB Output is correct
77 Correct 109 ms 12280 KB Output is correct
78 Correct 120 ms 12284 KB Output is correct
79 Correct 92 ms 12280 KB Output is correct
80 Correct 107 ms 12280 KB Output is correct
81 Correct 103 ms 12372 KB Output is correct
82 Correct 109 ms 12280 KB Output is correct
83 Correct 129 ms 12332 KB Output is correct
84 Correct 106 ms 12280 KB Output is correct
85 Correct 126 ms 12408 KB Output is correct
86 Correct 122 ms 12280 KB Output is correct
87 Correct 130 ms 12316 KB Output is correct
88 Correct 137 ms 12280 KB Output is correct
89 Correct 144 ms 12268 KB Output is correct
90 Correct 135 ms 12280 KB Output is correct
91 Correct 133 ms 12280 KB Output is correct
92 Correct 133 ms 12280 KB Output is correct