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Submission #956838

# Submission time Handle Problem Language Result Execution time Memory
956838 2024-04-02T14:23:08 Z wood Mecho (IOI09_mecho) C++17
84 / 100
 145 ms 6348 KB 
#include <bits/stdc++.h>  
using namespace std;
 
typedef long long ll;
typedef pair<int,int> p32;
typedef pair<ll,ll> p64;
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define MOD %1000000007

int dfx[4] = {1,-1,0,0}; int dfy[4] = {0,0,1,-1};

int main()
{
    fast_cin();
    #ifndef ONLINE_JUDGE
        #ifdef _WIN32
            freopen("input.in", "r", stdin);
            freopen("input.out", "w", stdout);
        #endif
    #endif
    int n,s; cin>>n>>s;
    char arr[n][n];
    int bees[n][n];
    fill(bees[0],bees[0]+n*n,INT_MAX);
    queue<p32> hq;
    p32 start;
    for (size_t i = 0; i < n; i++)
    {
        for (size_t j = 0; j < n; j++)
        {
            cin>>arr[i][j];
            if(arr[i][j]=='H'){
               bees[i][j] = 1; 
                hq.emplace(i,j);
            }
            if(arr[i][j]=='M') start = p32(i,j);
        }
    }
    while(!hq.empty()){
        for (size_t i = 0; i < 4; i++)
        {
            int x = hq.front().fi+dfx[i];
            int y = hq.front().se+dfy[i];
            if(x>=0&&x<n&&y>=0&&y<n&&bees[x][y]==INT_MAX&&arr[x][y]!='T'&&arr[x][y]!='D'){
                bees[x][y] = bees[hq.front().fi][hq.front().se] + 1;
                hq.emplace(x,y);
            }
        }
        hq.pop();
    }
    int l = -1; 
    int r = 1e9;
    while(r-l>1){
        int mid = (l+r)/2;
        queue<p32> q;
        q.push(start);
        int depth[n][n];
        memset(depth,0,sizeof depth);
        depth[start.fi][start.se] = 1;
        while(!q.empty()){
            for (size_t i = 0; i < 4; i++)
            {
                int x = q.front().fi+dfx[i];
                int y = q.front().se+dfy[i];
                int d = depth[q.front().fi][q.front().se];
                if(x>=0&&x<n&&y>=0&&y<n&&!depth[x][y]&&arr[x][y]!='T'&&(d+s)/s+mid<bees[x][y]){
                    if(arr[x][y]=='D'&&mid<bees[start.fi][start.se]){
                        l = mid;
                        goto next;
                    }
                    depth[x][y] = d+1;
                    q.emplace(x,y);
                }
            }
            q.pop();
        }
        r = mid;
        next: 
        continue;
    }
    cout<<l<<'\n';
    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:31:26: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   31 |     for (size_t i = 0; i < n; i++)
      |                        ~~^~~
mecho.cpp:33:30: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   33 |         for (size_t j = 0; j < n; j++)
      |                            ~~^~~

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 74 ms 6200 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 0 ms 348 KB Output isn't correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Correct 1 ms 484 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 600 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 3 ms 1372 KB Output is correct
34 Correct 3 ms 1372 KB Output is correct
35 Correct 14 ms 1372 KB Output is correct
36 Correct 4 ms 1628 KB Output is correct
37 Correct 4 ms 1628 KB Output is correct
38 Correct 19 ms 1628 KB Output is correct
39 Correct 5 ms 2140 KB Output is correct
40 Correct 5 ms 2140 KB Output is correct
41 Correct 24 ms 2240 KB Output is correct
42 Correct 6 ms 2652 KB Output is correct
43 Correct 6 ms 2412 KB Output is correct
44 Correct 33 ms 2648 KB Output is correct
45 Correct 7 ms 2908 KB Output is correct
46 Correct 8 ms 2908 KB Output is correct
47 Correct 40 ms 2908 KB Output is correct
48 Correct 9 ms 3420 KB Output is correct
49 Correct 9 ms 3420 KB Output is correct
50 Correct 53 ms 3604 KB Output is correct
51 Correct 10 ms 3928 KB Output is correct
52 Correct 11 ms 4052 KB Output is correct
53 Correct 55 ms 3928 KB Output is correct
54 Correct 12 ms 4700 KB Output is correct
55 Correct 12 ms 4700 KB Output is correct
56 Correct 68 ms 4700 KB Output is correct
57 Correct 13 ms 5208 KB Output is correct
58 Correct 14 ms 5212 KB Output is correct
59 Correct 74 ms 5212 KB Output is correct
60 Correct 16 ms 5980 KB Output is correct
61 Correct 16 ms 5976 KB Output is correct
62 Correct 85 ms 6072 KB Output is correct
63 Correct 86 ms 5968 KB Output is correct
64 Correct 145 ms 5980 KB Output is correct
65 Correct 137 ms 5976 KB Output is correct
66 Correct 96 ms 5976 KB Output is correct
67 Correct 92 ms 6068 KB Output is correct
68 Correct 44 ms 6232 KB Output is correct
69 Correct 42 ms 5972 KB Output is correct
70 Correct 28 ms 5968 KB Output is correct
71 Correct 31 ms 5980 KB Output is correct
72 Incorrect 26 ms 5924 KB Output isn't correct
73 Incorrect 26 ms 6236 KB Output isn't correct
74 Correct 50 ms 6236 KB Output is correct
75 Correct 50 ms 6224 KB Output is correct
76 Correct 45 ms 6148 KB Output is correct
77 Correct 48 ms 6236 KB Output is correct
78 Correct 54 ms 6100 KB Output is correct
79 Correct 42 ms 6236 KB Output is correct
80 Correct 47 ms 6228 KB Output is correct
81 Correct 53 ms 6336 KB Output is correct
82 Correct 43 ms 6232 KB Output is correct
83 Correct 59 ms 6228 KB Output is correct
84 Correct 55 ms 6236 KB Output is correct
85 Correct 53 ms 6228 KB Output is correct
86 Correct 57 ms 6224 KB Output is correct
87 Correct 63 ms 6348 KB Output is correct
88 Correct 61 ms 5968 KB Output is correct
89 Correct 62 ms 6236 KB Output is correct
90 Correct 62 ms 6236 KB Output is correct
91 Correct 61 ms 6236 KB Output is correct
92 Correct 60 ms 6036 KB Output is correct