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Submission #956835

# Submission time Handle Problem Language Result Execution time Memory
956835 2024-04-02T14:22:21 Z wood Mecho (IOI09_mecho) C++17
84 / 100
 145 ms 6416 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 = 1000000;
    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 1 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 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 72 ms 6176 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 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 1 ms 348 KB Output isn't correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 0 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 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 344 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 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 1 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 1624 KB Output is correct
39 Correct 5 ms 2140 KB Output is correct
40 Correct 5 ms 2136 KB Output is correct
41 Correct 24 ms 2140 KB Output is correct
42 Correct 6 ms 2652 KB Output is correct
43 Correct 6 ms 2652 KB Output is correct
44 Correct 39 ms 2660 KB Output is correct
45 Correct 7 ms 2908 KB Output is correct
46 Correct 9 ms 2908 KB Output is correct
47 Correct 49 ms 3128 KB Output is correct
48 Correct 8 ms 3416 KB Output is correct
49 Correct 9 ms 3420 KB Output is correct
50 Correct 46 ms 3500 KB Output is correct
51 Correct 10 ms 3932 KB Output is correct
52 Correct 10 ms 3932 KB Output is correct
53 Correct 54 ms 4064 KB Output is correct
54 Correct 14 ms 4696 KB Output is correct
55 Correct 12 ms 4696 KB Output is correct
56 Correct 67 ms 4748 KB Output is correct
57 Correct 13 ms 5208 KB Output is correct
58 Correct 15 ms 5212 KB Output is correct
59 Correct 76 ms 5248 KB Output is correct
60 Correct 15 ms 5980 KB Output is correct
61 Correct 15 ms 5980 KB Output is correct
62 Correct 87 ms 6068 KB Output is correct
63 Correct 87 ms 5884 KB Output is correct
64 Correct 145 ms 6232 KB Output is correct
65 Correct 126 ms 5876 KB Output is correct
66 Correct 109 ms 5980 KB Output is correct
67 Correct 87 ms 5976 KB Output is correct
68 Correct 40 ms 5976 KB Output is correct
69 Correct 39 ms 5980 KB Output is correct
70 Correct 36 ms 5976 KB Output is correct
71 Correct 30 ms 5976 KB Output is correct
72 Incorrect 32 ms 5968 KB Output isn't correct
73 Incorrect 28 ms 6348 KB Output isn't correct
74 Correct 45 ms 6224 KB Output is correct
75 Correct 49 ms 6228 KB Output is correct
76 Correct 48 ms 6416 KB Output is correct
77 Correct 47 ms 6232 KB Output is correct
78 Correct 56 ms 6320 KB Output is correct
79 Correct 43 ms 6236 KB Output is correct
80 Correct 50 ms 6232 KB Output is correct
81 Correct 52 ms 6228 KB Output is correct
82 Correct 40 ms 6236 KB Output is correct
83 Correct 64 ms 6236 KB Output is correct
84 Correct 54 ms 6100 KB Output is correct
85 Correct 61 ms 6276 KB Output is correct
86 Correct 74 ms 6284 KB Output is correct
87 Correct 69 ms 6228 KB Output is correct
88 Correct 61 ms 6236 KB Output is correct
89 Correct 69 ms 6052 KB Output is correct
90 Correct 61 ms 6232 KB Output is correct
91 Correct 61 ms 6236 KB Output is correct
92 Correct 60 ms 6224 KB Output is correct