oj.uz

Submission #254405

# Submission time Handle Problem Language Result Execution time Memory
254405 2020-07-30T00:14:57 Z oscarsierra12 Mecho (IOI09_mecho) C++14
84 / 100
 254 ms 12564 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 = 1000000000 ; 
   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 ( (nwx != en.first || nwy != en.second) && (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
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 8192 KB Output is correct
2 Correct 34 ms 8192 KB Output is correct
3 Correct 18 ms 8192 KB Output is correct
4 Correct 18 ms 8248 KB Output is correct
5 Correct 27 ms 8192 KB Output is correct
6 Correct 27 ms 8192 KB Output is correct
7 Correct 132 ms 12152 KB Output is correct
8 Correct 19 ms 8192 KB Output is correct
9 Correct 29 ms 8192 KB Output is correct
10 Correct 19 ms 8192 KB Output is correct
11 Correct 28 ms 8192 KB Output is correct
12 Incorrect 25 ms 8468 KB Output isn't correct
13 Incorrect 22 ms 8320 KB Output isn't correct
14 Correct 19 ms 8448 KB Output is correct
15 Correct 25 ms 8320 KB Output is correct
16 Correct 20 ms 8192 KB Output is correct
17 Correct 23 ms 8392 KB Output is correct
18 Correct 20 ms 8320 KB Output is correct
19 Correct 25 ms 8320 KB Output is correct
20 Correct 22 ms 8320 KB Output is correct
21 Correct 16 ms 8320 KB Output is correct
22 Correct 23 ms 8320 KB Output is correct
23 Correct 21 ms 8320 KB Output is correct
24 Correct 20 ms 8320 KB Output is correct
25 Correct 24 ms 8448 KB Output is correct
26 Correct 26 ms 8448 KB Output is correct
27 Correct 29 ms 8448 KB Output is correct
28 Correct 25 ms 8448 KB Output is correct
29 Correct 26 ms 8448 KB Output is correct
30 Correct 25 ms 8448 KB Output is correct
31 Correct 26 ms 8448 KB Output is correct
32 Correct 24 ms 8448 KB Output is correct
33 Correct 28 ms 9728 KB Output is correct
34 Correct 35 ms 9728 KB Output is correct
35 Correct 45 ms 9728 KB Output is correct
36 Correct 29 ms 9984 KB Output is correct
37 Correct 30 ms 9984 KB Output is correct
38 Correct 64 ms 9984 KB Output is correct
39 Correct 37 ms 10204 KB Output is correct
40 Correct 32 ms 10112 KB Output is correct
41 Correct 64 ms 10104 KB Output is correct
42 Correct 41 ms 10656 KB Output is correct
43 Correct 35 ms 10616 KB Output is correct
44 Correct 93 ms 10620 KB Output is correct
45 Correct 45 ms 10872 KB Output is correct
46 Correct 46 ms 10880 KB Output is correct
47 Correct 107 ms 10872 KB Output is correct
48 Correct 52 ms 11128 KB Output is correct
49 Correct 44 ms 11136 KB Output is correct
50 Correct 136 ms 11128 KB Output is correct
51 Correct 59 ms 11392 KB Output is correct
52 Correct 49 ms 11384 KB Output is correct
53 Correct 151 ms 11512 KB Output is correct
54 Correct 66 ms 11512 KB Output is correct
55 Correct 65 ms 11512 KB Output is correct
56 Correct 157 ms 11512 KB Output is correct
57 Correct 69 ms 11768 KB Output is correct
58 Correct 50 ms 11768 KB Output is correct
59 Correct 174 ms 11768 KB Output is correct
60 Correct 60 ms 12024 KB Output is correct
61 Correct 58 ms 12024 KB Output is correct
62 Correct 189 ms 12024 KB Output is correct
63 Correct 156 ms 12024 KB Output is correct
64 Correct 245 ms 12124 KB Output is correct
65 Correct 254 ms 12152 KB Output is correct
66 Correct 175 ms 12024 KB Output is correct
67 Correct 172 ms 12024 KB Output is correct
68 Correct 107 ms 12152 KB Output is correct
69 Correct 90 ms 12152 KB Output is correct
70 Correct 83 ms 12024 KB Output is correct
71 Correct 82 ms 12152 KB Output is correct
72 Incorrect 72 ms 12152 KB Output isn't correct
73 Incorrect 77 ms 12280 KB Output isn't correct
74 Correct 104 ms 12280 KB Output is correct
75 Correct 114 ms 12408 KB Output is correct
76 Correct 110 ms 12412 KB Output is correct
77 Correct 112 ms 12564 KB Output is correct
78 Correct 112 ms 12408 KB Output is correct
79 Correct 97 ms 12284 KB Output is correct
80 Correct 99 ms 12280 KB Output is correct
81 Correct 109 ms 12408 KB Output is correct
82 Correct 100 ms 12280 KB Output is correct
83 Correct 123 ms 12280 KB Output is correct
84 Correct 117 ms 12280 KB Output is correct
85 Correct 120 ms 12408 KB Output is correct
86 Correct 128 ms 12280 KB Output is correct
87 Correct 121 ms 12440 KB Output is correct
88 Correct 127 ms 12288 KB Output is correct
89 Correct 161 ms 12372 KB Output is correct
90 Correct 134 ms 12280 KB Output is correct
91 Correct 127 ms 12280 KB Output is correct
92 Correct 133 ms 12280 KB Output is correct