oj.uz

Submission #956826

# Submission time Handle Problem Language Result Execution time Memory
956826 2024-04-02T14:10:57 Z wood Mecho (IOI09_mecho) C++17
53 / 100
 142 ms 6800 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 = 1000;
    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
53.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 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 81 ms 6184 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 360 KB Output is correct
10 Correct 0 ms 352 KB Output is correct
11 Correct 1 ms 464 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 352 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 452 KB Output is correct
17 Correct 1 ms 352 KB Output is correct
18 Correct 0 ms 352 KB Output is correct
19 Correct 1 ms 352 KB Output is correct
20 Correct 1 ms 352 KB Output is correct
21 Correct 0 ms 352 KB Output is correct
22 Correct 1 ms 352 KB Output is correct
23 Incorrect 1 ms 352 KB Output isn't correct
24 Correct 1 ms 352 KB Output is correct
25 Incorrect 0 ms 352 KB Output isn't correct
26 Correct 0 ms 352 KB Output is correct
27 Incorrect 0 ms 356 KB Output isn't correct
28 Correct 0 ms 352 KB Output is correct
29 Incorrect 0 ms 352 KB Output isn't correct
30 Incorrect 0 ms 472 KB Output isn't correct
31 Incorrect 1 ms 360 KB Output isn't correct
32 Incorrect 1 ms 360 KB Output isn't correct
33 Incorrect 3 ms 1376 KB Output isn't correct
34 Incorrect 3 ms 1884 KB Output isn't correct
35 Correct 20 ms 1376 KB Output is correct
36 Incorrect 4 ms 1888 KB Output isn't correct
37 Incorrect 4 ms 1880 KB Output isn't correct
38 Correct 24 ms 1924 KB Output is correct
39 Incorrect 5 ms 2140 KB Output isn't correct
40 Incorrect 5 ms 2252 KB Output isn't correct
41 Correct 24 ms 2372 KB Output is correct
42 Incorrect 10 ms 2616 KB Output isn't correct
43 Incorrect 7 ms 2652 KB Output isn't correct
44 Correct 30 ms 2652 KB Output is correct
45 Incorrect 12 ms 3164 KB Output isn't correct
46 Incorrect 8 ms 3164 KB Output isn't correct
47 Correct 42 ms 3164 KB Output is correct
48 Incorrect 8 ms 3796 KB Output isn't correct
49 Incorrect 14 ms 3672 KB Output isn't correct
50 Correct 48 ms 3676 KB Output is correct
51 Incorrect 11 ms 4440 KB Output isn't correct
52 Incorrect 10 ms 4188 KB Output isn't correct
53 Correct 73 ms 4388 KB Output is correct
54 Incorrect 12 ms 4956 KB Output isn't correct
55 Incorrect 12 ms 4952 KB Output isn't correct
56 Correct 70 ms 4956 KB Output is correct
57 Incorrect 19 ms 5728 KB Output isn't correct
58 Incorrect 14 ms 5728 KB Output isn't correct
59 Correct 91 ms 5712 KB Output is correct
60 Incorrect 15 ms 6480 KB Output isn't correct
61 Incorrect 15 ms 6492 KB Output isn't correct
62 Correct 92 ms 6484 KB Output is correct
63 Correct 88 ms 6228 KB Output is correct
64 Correct 142 ms 6228 KB Output is correct
65 Correct 129 ms 6484 KB Output is correct
66 Correct 112 ms 6264 KB Output is correct
67 Correct 103 ms 6292 KB Output is correct
68 Correct 40 ms 6488 KB Output is correct
69 Correct 36 ms 6484 KB Output is correct
70 Correct 35 ms 6340 KB Output is correct
71 Correct 30 ms 6340 KB Output is correct
72 Incorrect 28 ms 6480 KB Output isn't correct
73 Incorrect 30 ms 6764 KB Output isn't correct
74 Correct 45 ms 6580 KB Output is correct
75 Correct 50 ms 6800 KB Output is correct
76 Correct 45 ms 6740 KB Output is correct
77 Correct 43 ms 6780 KB Output is correct
78 Correct 53 ms 6480 KB Output is correct
79 Correct 47 ms 6700 KB Output is correct
80 Correct 48 ms 6484 KB Output is correct
81 Correct 56 ms 6492 KB Output is correct
82 Correct 47 ms 6480 KB Output is correct
83 Correct 60 ms 6480 KB Output is correct
84 Correct 55 ms 6480 KB Output is correct
85 Correct 58 ms 6480 KB Output is correct
86 Correct 65 ms 6680 KB Output is correct
87 Correct 55 ms 6492 KB Output is correct
88 Correct 60 ms 6484 KB Output is correct
89 Correct 59 ms 6480 KB Output is correct
90 Correct 63 ms 6664 KB Output is correct
91 Correct 59 ms 6428 KB Output is correct
92 Correct 61 ms 6480 KB Output is correct