oj.uz

Submission #1100763

# Submission time Handle Problem Language Result Execution time Memory
1100763 2024-10-14T15:44:34 Z Uniq0rn Mecho (IOI09_mecho) C++14
100 / 100
 179 ms 6248 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define ld long double 
#define ll long long int
#define pi pair<int,int>
#define sz(x) (int)x.size()
#define all(x) begin(x),end(x)
 
int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n,s;cin >> n >> s;
    vector<vector<char>> a(n + 1,vector<char>(n + 1));
    queue<pair<int,int>> qu;
    vector<vector<int>> bdist(n + 1,vector<int>(n + 1,1e9));
    int si = -1,sj = -1;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            cin >> a[i][j];
            if(a[i][j] == 'H'){
                bdist[i][j] = 0;
                qu.push({i,j});
            }
            if(a[i][j] == 'M'){
                si = i;
                sj = j;
            }
        }
    }
    while(sz(qu)){
        int ni = qu.front().first,nj = qu.front().second;
        qu.pop();
        for(int i=-1;i<=1;i++) for(int j=-1;j<=1;j++){
            if(abs(i) == abs(j)) continue;
            int ii = ni + i,jj = nj + j;
            if(ii < 1 || ii > n || jj < 1 || jj > n) continue;
            if(bdist[ii][jj] != 1e9 || a[ii][jj] == 'T' || a[ii][jj] == 'D') continue;
            bdist[ii][jj] = bdist[ni][nj] + 1;
            qu.push({ii,jj});
        }
    }
    int ans = -1;
    int l = 0,r = bdist[si][sj] - 1;
    while(l <= r){
        int mid = (l + r) >> 1;
        vector<vector<int>> dist(n + 1,vector<int>(n + 1,-1));
        queue<pair<int,int>> q;
        q.push({si,sj});
        dist[si][sj] = 0;
        bool ok = false;
        while(sz(q)){
            int ni = q.front().first,nj = q.front().second;
            q.pop();
            if(a[ni][nj] == 'D'){
                ok = true;
                break;
            }
            for(int i=-1;i<=1;i++) for(int j=-1;j<=1;j++){
                if(abs(i) == abs(j)) continue;
                int ii = ni + i,jj = nj + j;
                if(ii < 1 || ii > n || jj < 1 || jj > n) continue;
                if(dist[ii][jj] != -1) continue;
                if(bdist[ii][jj] <= mid + (dist[ni][nj] + 1) / s) continue;
                if(a[ii][jj] == 'T') continue;
                dist[ii][jj] = dist[ni][nj] + 1;
                q.push({ii,jj});
            }
        }
        if(ok){
            l = mid + 1;
            ans = mid;
        }
        else r = mid - 1;
    }
    cout << ans;
    return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 0 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 94 ms 6232 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 336 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 336 KB Output is correct
14 Correct 1 ms 336 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 508 KB Output is correct
17 Correct 1 ms 336 KB Output is correct
18 Correct 1 ms 336 KB Output is correct
19 Correct 1 ms 336 KB Output is correct
20 Correct 1 ms 504 KB Output is correct
21 Correct 1 ms 336 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 336 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 1 ms 336 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 1 ms 336 KB Output is correct
31 Correct 1 ms 504 KB Output is correct
32 Correct 1 ms 336 KB Output is correct
33 Correct 7 ms 1572 KB Output is correct
34 Correct 8 ms 1572 KB Output is correct
35 Correct 20 ms 1568 KB Output is correct
36 Correct 9 ms 1872 KB Output is correct
37 Correct 9 ms 1924 KB Output is correct
38 Correct 29 ms 1932 KB Output is correct
39 Correct 15 ms 2472 KB Output is correct
40 Correct 15 ms 2304 KB Output is correct
41 Correct 37 ms 2308 KB Output is correct
42 Correct 15 ms 2728 KB Output is correct
43 Correct 16 ms 2740 KB Output is correct
44 Correct 44 ms 2688 KB Output is correct
45 Correct 18 ms 3212 KB Output is correct
46 Correct 19 ms 3200 KB Output is correct
47 Correct 50 ms 3220 KB Output is correct
48 Correct 21 ms 3696 KB Output is correct
49 Correct 22 ms 3748 KB Output is correct
50 Correct 63 ms 3716 KB Output is correct
51 Correct 27 ms 4328 KB Output is correct
52 Correct 26 ms 4328 KB Output is correct
53 Correct 77 ms 4272 KB Output is correct
54 Correct 31 ms 5060 KB Output is correct
55 Correct 31 ms 4892 KB Output is correct
56 Correct 98 ms 4852 KB Output is correct
57 Correct 39 ms 5576 KB Output is correct
58 Correct 36 ms 5708 KB Output is correct
59 Correct 104 ms 5468 KB Output is correct
60 Correct 41 ms 6232 KB Output is correct
61 Correct 41 ms 6248 KB Output is correct
62 Correct 125 ms 6208 KB Output is correct
63 Correct 107 ms 6188 KB Output is correct
64 Correct 179 ms 6184 KB Output is correct
65 Correct 156 ms 6236 KB Output is correct
66 Correct 118 ms 6196 KB Output is correct
67 Correct 110 ms 6228 KB Output is correct
68 Correct 63 ms 6196 KB Output is correct
69 Correct 46 ms 6216 KB Output is correct
70 Correct 42 ms 6192 KB Output is correct
71 Correct 36 ms 6184 KB Output is correct
72 Correct 41 ms 6228 KB Output is correct
73 Correct 36 ms 6224 KB Output is correct
74 Correct 65 ms 6240 KB Output is correct
75 Correct 74 ms 6216 KB Output is correct
76 Correct 74 ms 6224 KB Output is correct
77 Correct 68 ms 6224 KB Output is correct
78 Correct 93 ms 6196 KB Output is correct
79 Correct 61 ms 6224 KB Output is correct
80 Correct 67 ms 6216 KB Output is correct
81 Correct 70 ms 6228 KB Output is correct
82 Correct 66 ms 6224 KB Output is correct
83 Correct 92 ms 6232 KB Output is correct
84 Correct 73 ms 6224 KB Output is correct
85 Correct 87 ms 6204 KB Output is correct
86 Correct 87 ms 6224 KB Output is correct
87 Correct 75 ms 6236 KB Output is correct
88 Correct 89 ms 6228 KB Output is correct
89 Correct 89 ms 6224 KB Output is correct
90 Correct 103 ms 6136 KB Output is correct
91 Correct 92 ms 6228 KB Output is correct
92 Correct 90 ms 6228 KB Output is correct