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Submission #1007492

# Submission time Handle Problem Language Result Execution time Memory
1007492 2024-06-25T04:18:57 Z huutuan Mecho (IOI09_mecho) C++14
29 / 100
 116 ms 12120 KB 
#include <bits/stdc++.h>

using namespace std;

#define int long long

const int N=810, dx[]={1, -1, 0, 0}, dy[]={0, 0, 1, -1};
int n, s;
char a[N][N];
int d[N][N], f[N][N];
int xm, ym, xd, yd;

bool check(int t){
   queue<pair<int, int>> q;
   memset(f, 0x3f, sizeof f);
   q.emplace(xm, ym); f[xm][ym]=t*s;
   if ((f[xm][ym]+s-1)/s>d[xm][ym]) return 0;
   while (q.size()){
      int x=q.front().first, y=q.front().second; q.pop();
      if (x==xd && y==yd) return 1;
      for (int i=0; i<4; ++i){
         int u=x+dx[i], v=y+dy[i];
         if (u<1 || v<1 || u>n || v>n || f[u][v]<1e18 || (f[x][y]+s)/s>d[u][v] || a[u][v]=='T') continue;
         f[u][v]=f[x][y]+1;
         q.emplace(u, v);
      }
   }
   return 0;
}

int32_t main(){
   ios_base::sync_with_stdio(false);
   cin.tie(nullptr);
   cin >> n >> s;
   queue<pair<int, int>> q;
   memset(d, 0x3f, sizeof d);
   for (int i=1; i<=n; ++i) for (int j=1; j<=n; ++j){
      cin >> a[i][j];
      if (a[i][j]=='M') xm=i, ym=j;
      if (a[i][j]=='D') xd=i, yd=j;
      if (a[i][j]=='H'){
         d[i][j]=0;
         q.emplace(i, j);
      }
   }
   while (q.size()){
      int x=q.front().first, y=q.front().second; q.pop();
      for (int i=0; i<4; ++i){
         int u=x+dx[i], v=y+dy[i];
         if (u<1 || v<1 || u>n || v>n || d[u][v]<1e18 || a[u][v]=='T' || a[u][v]=='D') continue;
         d[u][v]=d[x][y]+1;
         q.emplace(u, v);
      }
   }
   int l=1, r=1e9;
   while (l<=r){
      int mid=(l+r)>>1;
      if (check(mid)) l=mid+1;
      else r=mid-1;
   }
   if (r==(int)1e9) r=-1;
   cout << r << '\n';
   return 0;
}

Subtask #1
29.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 10844 KB Output isn't correct
2 Incorrect 4 ms 10708 KB Output isn't correct
3 Incorrect 4 ms 10844 KB Output isn't correct
4 Incorrect 4 ms 10844 KB Output isn't correct
5 Correct 4 ms 10900 KB Output is correct
6 Correct 3 ms 10844 KB Output is correct
7 Correct 49 ms 11400 KB Output is correct
8 Incorrect 5 ms 10844 KB Output isn't correct
9 Correct 4 ms 10844 KB Output is correct
10 Correct 4 ms 10844 KB Output is correct
11 Correct 4 ms 10844 KB Output is correct
12 Incorrect 4 ms 10844 KB Output isn't correct
13 Incorrect 3 ms 10844 KB Output isn't correct
14 Incorrect 3 ms 10844 KB Output isn't correct
15 Incorrect 4 ms 10844 KB Output isn't correct
16 Correct 3 ms 10892 KB Output is correct
17 Incorrect 4 ms 10896 KB Output isn't correct
18 Correct 4 ms 10844 KB Output is correct
19 Incorrect 3 ms 10844 KB Output isn't correct
20 Correct 4 ms 10840 KB Output is correct
21 Incorrect 4 ms 10844 KB Output isn't correct
22 Correct 4 ms 10892 KB Output is correct
23 Incorrect 4 ms 10844 KB Output isn't correct
24 Correct 4 ms 10844 KB Output is correct
25 Incorrect 4 ms 10844 KB Output isn't correct
26 Correct 4 ms 10840 KB Output is correct
27 Incorrect 4 ms 10840 KB Output isn't correct
28 Correct 5 ms 10840 KB Output is correct
29 Incorrect 4 ms 10844 KB Output isn't correct
30 Correct 4 ms 10840 KB Output is correct
31 Incorrect 5 ms 10840 KB Output isn't correct
32 Correct 5 ms 10904 KB Output is correct
33 Incorrect 6 ms 11008 KB Output isn't correct
34 Correct 6 ms 10844 KB Output is correct
35 Correct 16 ms 10844 KB Output is correct
36 Incorrect 7 ms 10844 KB Output isn't correct
37 Correct 9 ms 10840 KB Output is correct
38 Correct 20 ms 11060 KB Output is correct
39 Incorrect 7 ms 10840 KB Output isn't correct
40 Correct 8 ms 10840 KB Output is correct
41 Correct 24 ms 11100 KB Output is correct
42 Incorrect 8 ms 11096 KB Output isn't correct
43 Correct 8 ms 11100 KB Output is correct
44 Correct 30 ms 11144 KB Output is correct
45 Incorrect 9 ms 11100 KB Output isn't correct
46 Correct 9 ms 11040 KB Output is correct
47 Correct 36 ms 11096 KB Output is correct
48 Incorrect 10 ms 11100 KB Output isn't correct
49 Correct 15 ms 10968 KB Output is correct
50 Correct 42 ms 11100 KB Output is correct
51 Incorrect 10 ms 11100 KB Output isn't correct
52 Correct 11 ms 11064 KB Output is correct
53 Correct 49 ms 11100 KB Output is correct
54 Incorrect 11 ms 11100 KB Output isn't correct
55 Correct 12 ms 11100 KB Output is correct
56 Correct 60 ms 11292 KB Output is correct
57 Incorrect 12 ms 11100 KB Output isn't correct
58 Correct 12 ms 11100 KB Output is correct
59 Correct 66 ms 11112 KB Output is correct
60 Incorrect 13 ms 11356 KB Output isn't correct
61 Correct 14 ms 11356 KB Output is correct
62 Correct 77 ms 11356 KB Output is correct
63 Correct 66 ms 11192 KB Output is correct
64 Correct 109 ms 11352 KB Output is correct
65 Correct 116 ms 11356 KB Output is correct
66 Incorrect 86 ms 11352 KB Output isn't correct
67 Incorrect 76 ms 11356 KB Output isn't correct
68 Correct 33 ms 11356 KB Output is correct
69 Correct 36 ms 11352 KB Output is correct
70 Correct 32 ms 11432 KB Output is correct
71 Correct 25 ms 11348 KB Output is correct
72 Incorrect 23 ms 11344 KB Output isn't correct
73 Incorrect 27 ms 12120 KB Output isn't correct
74 Correct 41 ms 11896 KB Output is correct
75 Correct 43 ms 11868 KB Output is correct
76 Correct 38 ms 11856 KB Output is correct
77 Correct 45 ms 11856 KB Output is correct
78 Incorrect 45 ms 11868 KB Output isn't correct
79 Correct 39 ms 11844 KB Output is correct
80 Correct 42 ms 11868 KB Output is correct
81 Correct 42 ms 11860 KB Output is correct
82 Correct 38 ms 11864 KB Output is correct
83 Correct 50 ms 11608 KB Output is correct
84 Correct 48 ms 11612 KB Output is correct
85 Correct 45 ms 11608 KB Output is correct
86 Correct 51 ms 11608 KB Output is correct
87 Correct 51 ms 11608 KB Output is correct
88 Correct 47 ms 11612 KB Output is correct
89 Correct 52 ms 11612 KB Output is correct
90 Correct 55 ms 11512 KB Output is correct
91 Correct 53 ms 11664 KB Output is correct
92 Correct 45 ms 11612 KB Output is correct