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Submission #1071921

# Submission time Handle Problem Language Result Execution time Memory
1071921 2024-08-23T12:23:31 Z 7again Mecho (IOI09_mecho) C++17
50 / 100
 503 ms 8912 KB 
#include <bits/stdc++.h>

using namespace std ;

const int N = 1001 ;
int dx[]{0 , 0 , 1 , -1} ;
int dy[]{1 , -1 , 0 , 0} ;


int n , s ;
pair <int , int> Honey , Home ;
char a[N][N] ;

bool inside(int x , int y) {
    return (x >= 0 && y >= 0 && x < n && y < n && a[x][y] != 'T') ;
}
bool val(int x , int y) {
    return  x / s < y ;
}
int ok(int time) {

    int mn2[n][n] ;
    fill_n(&mn2[0][0] , n*n , 1e9) ;
    queue<pair <int , int>>  q2 ;
    for(int i = 0 ; i < n ; i++) {
        for(int j = 0 ; j < n ; j++) {
            if(a[i][j] == 'H') {
                q2.push({i, j}) ;
                mn2[i][j] = 0 ;
            }
        }
    }
    while(q2.size()) {
        pair <int , int> t = q2.front() ;
        q2.pop() ;
        for(int i = 0 ; i < 4 ; i++) {
            int x = t.first + dx[i] ;
            int y = t.second + dy[i] ;
            if(inside(x , y) &&  mn2[t.first][t.second] + 1 < mn2[x][y]) {
                mn2[x][y] = mn2[t.first][t.second] + 1 ;
                q2.push({x, y}) ;
            }
        }
    }

    int mn[n][n] ;
    fill_n(&mn[0][0] , n * n , 1e9 ) ;
    queue <pair <int , int>> q ;
    mn[Honey.first][Honey.second] = 0 ;
    q.push(Honey) ;
    while(!q.empty()) {
        pair <int , int> t = q.front() ;
        q.pop() ;
        for(int i = 0 ; i < 4 ; i++) {
            int x = t.first + dx[i] ;
            int y = t.second + dy[i] ;
            if(val(mn[t.first][t.second] + 1 , mn2[x][y] - time) && inside(x , y) && mn[t.first][t.second] + 1 < mn[x][y]) {
                mn[x][y] = mn[t.first][t.second] + 1 ;
                q.push({x , y}) ;
            }
        }
    }
    if(mn[Home.first][Home.second] == 1e9)
        return  0 ;
    return  1 ;
}
int main() {
    ios_base::sync_with_stdio(0) ;
    cin.tie(0) ;
    cout.tie(0) ;

    cin >> n >> s ;

    for(int i = 0 ; i < n ; i++) {
        for(int j = 0 ; j < n ; j++) {
            cin >> a[i][j] ;
            if(a[i][j] == 'M')
                Honey = {i , j} ;
            if(a[i][j] == 'D')
                Home = {i , j} ;
        }
    }

    int l = 0 , r = 1e9 ;
    while(l + 1 < r) {
        int m = (l + r) / 2 ;
        if(ok(m))
            l = m ;
        else
            r = m ;
    }
    cout << l << "\n" ;
}

Subtask #1
50.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 1 ms 348 KB Output isn't correct
5 Correct 0 ms 348 KB Output is correct
6 Incorrect 1 ms 348 KB Output isn't correct
7 Incorrect 431 ms 6968 KB Output isn't correct
8 Incorrect 0 ms 348 KB Output isn't correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Incorrect 1 ms 348 KB Output isn't correct
13 Incorrect 2 ms 348 KB Output isn't correct
14 Incorrect 2 ms 348 KB Output isn't correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 464 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 600 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 1 ms 432 KB Output is correct
25 Correct 1 ms 556 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 3 ms 344 KB Output is correct
28 Correct 2 ms 348 KB Output is correct
29 Correct 2 ms 348 KB Output is correct
30 Correct 2 ms 348 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 3 ms 348 KB Output is correct
33 Correct 31 ms 1888 KB Output is correct
34 Correct 31 ms 1628 KB Output is correct
35 Correct 55 ms 1880 KB Output is correct
36 Correct 39 ms 2140 KB Output is correct
37 Correct 39 ms 2140 KB Output is correct
38 Runtime error 68 ms 4028 KB Execution killed with signal 11
39 Correct 53 ms 2664 KB Output is correct
40 Correct 62 ms 2664 KB Output is correct
41 Correct 94 ms 2672 KB Output is correct
42 Correct 68 ms 3132 KB Output is correct
43 Runtime error 35 ms 5688 KB Execution killed with signal 11
44 Correct 131 ms 3164 KB Output is correct
45 Correct 76 ms 3640 KB Output is correct
46 Correct 77 ms 3644 KB Output is correct
47 Correct 154 ms 3416 KB Output is correct
48 Correct 124 ms 4184 KB Output is correct
49 Correct 97 ms 4184 KB Output is correct
50 Correct 175 ms 4184 KB Output is correct
51 Correct 111 ms 4652 KB Output is correct
52 Correct 131 ms 4700 KB Output is correct
53 Runtime error 183 ms 8912 KB Execution killed with signal 11
54 Correct 125 ms 5208 KB Output is correct
55 Correct 117 ms 5212 KB Output is correct
56 Correct 234 ms 5448 KB Output is correct
57 Correct 143 ms 5976 KB Output is correct
58 Correct 127 ms 5980 KB Output is correct
59 Correct 263 ms 6140 KB Output is correct
60 Correct 158 ms 6748 KB Output is correct
61 Correct 150 ms 6744 KB Output is correct
62 Correct 303 ms 6740 KB Output is correct
63 Correct 412 ms 6688 KB Output is correct
64 Correct 503 ms 6860 KB Output is correct
65 Correct 486 ms 6864 KB Output is correct
66 Correct 448 ms 6744 KB Output is correct
67 Incorrect 416 ms 6748 KB Output isn't correct
68 Correct 432 ms 6888 KB Output is correct
69 Correct 448 ms 6892 KB Output is correct
70 Correct 453 ms 6896 KB Output is correct
71 Correct 417 ms 6892 KB Output is correct
72 Incorrect 424 ms 6888 KB Output isn't correct
73 Incorrect 395 ms 7252 KB Output isn't correct
74 Correct 415 ms 7004 KB Output is correct
75 Correct 430 ms 7136 KB Output is correct
76 Correct 411 ms 7128 KB Output is correct
77 Correct 421 ms 7004 KB Output is correct
78 Incorrect 371 ms 7252 KB Output isn't correct
79 Correct 381 ms 7116 KB Output is correct
80 Correct 378 ms 7004 KB Output is correct
81 Correct 376 ms 6992 KB Output is correct
82 Correct 380 ms 6992 KB Output is correct
83 Correct 381 ms 6992 KB Output is correct
84 Correct 391 ms 6992 KB Output is correct
85 Correct 402 ms 7248 KB Output is correct
86 Correct 393 ms 7000 KB Output is correct
87 Correct 390 ms 6996 KB Output is correct
88 Correct 376 ms 6992 KB Output is correct
89 Correct 391 ms 7028 KB Output is correct
90 Correct 400 ms 7252 KB Output is correct
91 Correct 391 ms 7024 KB Output is correct
92 Correct 407 ms 6996 KB Output is correct