oj.uz

Submission #104008

# Submission time Handle Problem Language Result Execution time Memory
104008 2019-04-03T16:39:22 Z Badral Mecho (IOI09_mecho) C++17
100 / 100
 311 ms 7928 KB 
#include<bits/stdc++.h>
using namespace std;
#define pi pair<int, int>

char a[1015][1015];
int dx[] = {0, 0, 0, 1, -1, -1, 1, 1, -1};
int dy[] = {0, 1, -1, 0, 0, -1, -1, 1, 1};
int bear[1105][1015], bee[1105][1015], xx = -1, yy = -1, xxx = -1, yyy = -1, n, kk;

bool asdasd = 0;

bool can(int k) {

    if ( k >= bee[xx][yy] ) return 0;

    for ( int i = 1; i <= n; i++ ) 
        for ( int j = 1; j <= n; j++ ) 
            bear[i][j] = INT_MAX;

    bear[xx][yy] = 0;

    queue < pi > q;
    
    q.push(make_pair(xx, yy));
        int x, y;    
    while(!q.empty()) {
        tie(x, y) = q.front();
        q.pop();
        for(int i = 1; i <= 4; i++) {
            int x1 = x + dx[i], y1 = y + dy[i];
            if ( a[x1][y1] == 'D' ) {asdasd = 1; return 1;}
            if ( a[x1][y1] == 'G' && bear[x][y] + 1 < kk * ( bee[x1][y1] - k ) && bear[x1][y1] == INT_MAX ) {
                bear[x1][y1] = bear[x][y] + 1;
                q.push ( make_pair ( x1, y1 ) ); 
            }
        }
    }
    return 0;  
}

int main() {
    cin >> n >> kk;
    queue < pi > p;
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= n; j++) {
            bee[i][j] = INT_MAX; 
            cin >>a[i][j];
            if ( a[i][j] == 'H' ) {p.push(make_pair(i, j)); bee[i][j] = 0;}
            if ( a[i][j] == 'M' ) xx = i, yy = j;
        }
    }

    while(!p.empty()) {
        int x, y; tie(x, y) = p.front(); p.pop();
        for ( int i = 1; i <= 4; i++ ) {
            int x1 = x + dx[i], y1 = y + dy[i];

            if ( bee[x1][y1] == INT_MAX && ( a[x1][y1] == 'G' || a[x1][y1] == 'M' ) ) {
                bee[x1][y1] = bee[x][y] + 1; p.push ( make_pair ( x1, y1 ) );
            }
        }
    }

    int k = 0, mm = n * n;
    for(int i = mm/2; i >= 1; i /= 2) 
        while(i + k <= mm && can(i+k)) 
            k += i;
    bool pppp = can(0);
    if ( !asdasd ) cout << -1;
    else cout << k;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:68:10: warning: unused variable 'pppp' [-Wunused-variable]
     bool pppp = can(0);
          ^~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 216 ms 7748 KB Output is correct
8 Correct 2 ms 512 KB Output is correct
9 Correct 2 ms 512 KB Output is correct
10 Correct 2 ms 588 KB Output is correct
11 Correct 2 ms 512 KB Output is correct
12 Correct 3 ms 896 KB Output is correct
13 Correct 3 ms 768 KB Output is correct
14 Correct 3 ms 896 KB Output is correct
15 Correct 3 ms 512 KB Output is correct
16 Correct 3 ms 512 KB Output is correct
17 Correct 2 ms 640 KB Output is correct
18 Correct 2 ms 640 KB Output is correct
19 Correct 3 ms 640 KB Output is correct
20 Correct 2 ms 640 KB Output is correct
21 Correct 2 ms 768 KB Output is correct
22 Correct 3 ms 768 KB Output is correct
23 Correct 2 ms 768 KB Output is correct
24 Correct 3 ms 768 KB Output is correct
25 Correct 3 ms 896 KB Output is correct
26 Correct 3 ms 896 KB Output is correct
27 Correct 4 ms 896 KB Output is correct
28 Correct 3 ms 896 KB Output is correct
29 Correct 3 ms 1024 KB Output is correct
30 Correct 3 ms 1024 KB Output is correct
31 Correct 3 ms 1024 KB Output is correct
32 Correct 4 ms 1024 KB Output is correct
33 Correct 14 ms 3584 KB Output is correct
34 Correct 18 ms 3456 KB Output is correct
35 Correct 33 ms 3456 KB Output is correct
36 Correct 17 ms 3968 KB Output is correct
37 Correct 26 ms 3968 KB Output is correct
38 Correct 40 ms 3968 KB Output is correct
39 Correct 24 ms 4344 KB Output is correct
40 Correct 20 ms 4352 KB Output is correct
41 Correct 63 ms 4404 KB Output is correct
42 Correct 24 ms 4736 KB Output is correct
43 Correct 25 ms 4736 KB Output is correct
44 Correct 84 ms 4856 KB Output is correct
45 Correct 30 ms 5240 KB Output is correct
46 Correct 27 ms 5248 KB Output is correct
47 Correct 102 ms 5332 KB Output is correct
48 Correct 41 ms 5624 KB Output is correct
49 Correct 34 ms 5632 KB Output is correct
50 Correct 121 ms 5752 KB Output is correct
51 Correct 35 ms 6136 KB Output is correct
52 Correct 43 ms 6136 KB Output is correct
53 Correct 142 ms 6136 KB Output is correct
54 Correct 41 ms 6648 KB Output is correct
55 Correct 43 ms 6648 KB Output is correct
56 Correct 167 ms 6648 KB Output is correct
57 Correct 72 ms 7160 KB Output is correct
58 Correct 59 ms 7040 KB Output is correct
59 Correct 193 ms 7032 KB Output is correct
60 Correct 57 ms 7416 KB Output is correct
61 Correct 62 ms 7516 KB Output is correct
62 Correct 235 ms 7628 KB Output is correct
63 Correct 168 ms 7544 KB Output is correct
64 Correct 311 ms 7544 KB Output is correct
65 Correct 242 ms 7516 KB Output is correct
66 Correct 230 ms 7544 KB Output is correct
67 Correct 177 ms 7544 KB Output is correct
68 Correct 95 ms 7544 KB Output is correct
69 Correct 97 ms 7544 KB Output is correct
70 Correct 84 ms 7512 KB Output is correct
71 Correct 82 ms 7544 KB Output is correct
72 Correct 71 ms 7528 KB Output is correct
73 Correct 86 ms 7928 KB Output is correct
74 Correct 132 ms 7672 KB Output is correct
75 Correct 193 ms 7804 KB Output is correct
76 Correct 131 ms 7800 KB Output is correct
77 Correct 163 ms 7696 KB Output is correct
78 Correct 149 ms 7800 KB Output is correct
79 Correct 144 ms 7800 KB Output is correct
80 Correct 121 ms 7928 KB Output is correct
81 Correct 144 ms 7700 KB Output is correct
82 Correct 129 ms 7740 KB Output is correct
83 Correct 142 ms 7804 KB Output is correct
84 Correct 147 ms 7800 KB Output is correct
85 Correct 157 ms 7672 KB Output is correct
86 Correct 157 ms 7756 KB Output is correct
87 Correct 170 ms 7776 KB Output is correct
88 Correct 143 ms 7772 KB Output is correct
89 Correct 174 ms 7616 KB Output is correct
90 Correct 158 ms 7800 KB Output is correct
91 Correct 237 ms 7792 KB Output is correct
92 Correct 173 ms 7644 KB Output is correct