oj.uz

Submission #254411

# Submission time Handle Problem Language Result Execution time Memory
254411 2020-07-30T00:24:09 Z oscarsierra12 Mecho (IOI09_mecho) C++14
95 / 100
 234 ms 12664 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 ) {
          dist2[i][j] = N * N * N ; 
          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 = 2000000000 ; 
   while ( lw <= hg ) {
      int mid = (lw+hg) / 2 ;
      memset ( visi, 0, sizeof visi ) ; 
      memset ( dist, 0, sizeof dist ) ; 
      if ( mid < dist2[bg.first][bg.second] ) 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
95.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 8192 KB Output is correct
2 Correct 19 ms 8192 KB Output is correct
3 Correct 20 ms 8192 KB Output is correct
4 Correct 19 ms 8192 KB Output is correct
5 Correct 26 ms 8192 KB Output is correct
6 Correct 29 ms 8192 KB Output is correct
7 Correct 133 ms 12152 KB Output is correct
8 Correct 20 ms 8192 KB Output is correct
9 Correct 23 ms 8192 KB Output is correct
10 Correct 20 ms 8192 KB Output is correct
11 Correct 19 ms 8192 KB Output is correct
12 Incorrect 22 ms 8448 KB Output isn't correct
13 Correct 21 ms 8320 KB Output is correct
14 Correct 19 ms 8448 KB Output is correct
15 Correct 30 ms 8192 KB Output is correct
16 Correct 18 ms 8192 KB Output is correct
17 Correct 31 ms 8320 KB Output is correct
18 Correct 19 ms 8320 KB Output is correct
19 Correct 19 ms 8320 KB Output is correct
20 Correct 19 ms 8320 KB Output is correct
21 Correct 21 ms 8320 KB Output is correct
22 Correct 20 ms 8320 KB Output is correct
23 Correct 21 ms 8320 KB Output is correct
24 Correct 21 ms 8320 KB Output is correct
25 Correct 20 ms 8448 KB Output is correct
26 Correct 22 ms 8448 KB Output is correct
27 Correct 25 ms 8448 KB Output is correct
28 Correct 22 ms 8448 KB Output is correct
29 Correct 21 ms 8448 KB Output is correct
30 Correct 20 ms 8448 KB Output is correct
31 Correct 27 ms 8448 KB Output is correct
32 Correct 20 ms 8448 KB Output is correct
33 Correct 35 ms 9728 KB Output is correct
34 Correct 28 ms 9728 KB Output is correct
35 Correct 59 ms 9728 KB Output is correct
36 Correct 30 ms 9984 KB Output is correct
37 Correct 41 ms 9984 KB Output is correct
38 Correct 62 ms 9984 KB Output is correct
39 Correct 40 ms 10240 KB Output is correct
40 Correct 34 ms 10112 KB Output is correct
41 Correct 62 ms 10112 KB Output is correct
42 Correct 35 ms 10624 KB Output is correct
43 Correct 38 ms 10744 KB Output is correct
44 Correct 78 ms 10616 KB Output is correct
45 Correct 40 ms 10880 KB Output is correct
46 Correct 46 ms 10880 KB Output is correct
47 Correct 115 ms 10872 KB Output is correct
48 Correct 44 ms 11128 KB Output is correct
49 Correct 50 ms 11136 KB Output is correct
50 Correct 121 ms 11128 KB Output is correct
51 Correct 48 ms 11392 KB Output is correct
52 Correct 51 ms 11392 KB Output is correct
53 Correct 134 ms 11512 KB Output is correct
54 Correct 54 ms 11512 KB Output is correct
55 Correct 56 ms 11512 KB Output is correct
56 Correct 155 ms 11640 KB Output is correct
57 Correct 57 ms 11768 KB Output is correct
58 Correct 55 ms 11768 KB Output is correct
59 Correct 189 ms 11864 KB Output is correct
60 Correct 69 ms 12024 KB Output is correct
61 Correct 62 ms 12024 KB Output is correct
62 Correct 197 ms 12128 KB Output is correct
63 Correct 156 ms 12152 KB Output is correct
64 Correct 234 ms 12120 KB Output is correct
65 Correct 233 ms 12120 KB Output is correct
66 Correct 187 ms 12024 KB Output is correct
67 Correct 155 ms 12124 KB Output is correct
68 Correct 98 ms 12364 KB Output is correct
69 Correct 102 ms 12280 KB Output is correct
70 Correct 81 ms 12024 KB Output is correct
71 Correct 85 ms 12024 KB Output is correct
72 Correct 77 ms 12152 KB Output is correct
73 Correct 86 ms 12664 KB Output is correct
74 Correct 118 ms 12280 KB Output is correct
75 Correct 115 ms 12280 KB Output is correct
76 Correct 111 ms 12396 KB Output is correct
77 Correct 111 ms 12408 KB Output is correct
78 Correct 114 ms 12280 KB Output is correct
79 Correct 110 ms 12280 KB Output is correct
80 Correct 101 ms 12280 KB Output is correct
81 Correct 119 ms 12280 KB Output is correct
82 Correct 102 ms 12280 KB Output is correct
83 Correct 145 ms 12280 KB Output is correct
84 Correct 116 ms 12212 KB Output is correct
85 Correct 118 ms 12332 KB Output is correct
86 Correct 125 ms 12280 KB Output is correct
87 Correct 130 ms 12280 KB Output is correct
88 Correct 138 ms 12280 KB Output is correct
89 Correct 155 ms 12328 KB Output is correct
90 Correct 160 ms 12280 KB Output is correct
91 Correct 149 ms 12280 KB Output is correct
92 Correct 145 ms 12280 KB Output is correct