oj.uz

Submission #598323

# Submission time Handle Problem Language Result Execution time Memory
598323 2022-07-18T04:22:58 Z Hanksburger Mecho (IOI09_mecho) C++17
73 / 100
 394 ms 39816 KB 
#include <bits/stdc++.h>
using namespace std;
vector<int> adj[640005], bee;
queue<pair<int, int> > qq;
char a[640005];
bool b[640005];
int d[640005];
queue<int> q;
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, p, s, e, l=-1, r=640000;
    cin >> n >> p;
    for (int i=0; i<n*n; i++)
    {
        cin >> a[i];
        if (a[i]=='M')
            s=i;
        else if (a[i]=='D')
            e=i;
        else if (a[i]=='H')
            bee.push_back(i);
        if (a[i]!='T')
        {
            a[i]='G';
            if (i>=n && a[i-n]=='G')
            {
                adj[i].push_back(i-n);
                adj[i-n].push_back(i);
            }
            if (i%n && a[i-1]=='G')
            {
                adj[i].push_back(i-1);
                adj[i-1].push_back(i);
            }
        }
    }
    for (int u:bee)
    {
        q.push(u);
        b[u]=1;
    }
    while (!q.empty())
    {
        int u=q.front();
        q.pop();
        for (int v:adj[u])
        {
            if (!b[v])
            {
                d[v]=d[u]+1;
                q.push(v);
                b[v]=1;
            }
        }
    }
    while (l<r)
    {
        int m=(l+r+1)/2;
        for (int i=0; i<n*n; i++)
            b[i]=0;
        qq.push({s, 0});
        b[s]=1;
        bool ok=0;
        while (!qq.empty())
        {
            int u=qq.front().first, w=qq.front().second;
            qq.pop();
            for (int v:adj[u])
            {
                if (!b[v] && w+1<(d[v]-m)*p)
                {
                    if (v==e)
                    {
                        ok=1;
                        break;
                    }
                    qq.push({v, w+1});
                    b[v]=1;
                }
            }
            if (ok)
                while (!qq.empty())
                    qq.pop();
        }
        if (ok)
            l=m;
        else
            r=m-1;
    }
    cout << l;
    return 0;
}

Compilation message

mecho.cpp: In function 'int main()':
mecho.cpp:65:13: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
   65 |         b[s]=1;
      |         ~~~~^~
mecho.cpp:75:21: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
   75 |                     if (v==e)
      |                     ^~

Subtask #1
73.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 15360 KB Output is correct
2 Incorrect 10 ms 15316 KB Output isn't correct
3 Correct 9 ms 15268 KB Output is correct
4 Incorrect 10 ms 15316 KB Output isn't correct
5 Correct 8 ms 15368 KB Output is correct
6 Incorrect 9 ms 15368 KB Output isn't correct
7 Incorrect 333 ms 39816 KB Output isn't correct
8 Correct 9 ms 15360 KB Output is correct
9 Correct 8 ms 15316 KB Output is correct
10 Correct 8 ms 15316 KB Output is correct
11 Correct 8 ms 15268 KB Output is correct
12 Incorrect 10 ms 15416 KB Output isn't correct
13 Incorrect 9 ms 15420 KB Output isn't correct
14 Correct 9 ms 15444 KB Output is correct
15 Correct 9 ms 15316 KB Output is correct
16 Correct 8 ms 15364 KB Output is correct
17 Correct 9 ms 15316 KB Output is correct
18 Correct 8 ms 15316 KB Output is correct
19 Correct 8 ms 15316 KB Output is correct
20 Correct 8 ms 15356 KB Output is correct
21 Correct 8 ms 15364 KB Output is correct
22 Correct 9 ms 15368 KB Output is correct
23 Correct 10 ms 15316 KB Output is correct
24 Correct 9 ms 15316 KB Output is correct
25 Correct 8 ms 15444 KB Output is correct
26 Correct 10 ms 15460 KB Output is correct
27 Correct 9 ms 15444 KB Output is correct
28 Correct 11 ms 15424 KB Output is correct
29 Correct 9 ms 15424 KB Output is correct
30 Correct 9 ms 15476 KB Output is correct
31 Correct 9 ms 15572 KB Output is correct
32 Correct 9 ms 15444 KB Output is correct
33 Correct 16 ms 18132 KB Output is correct
34 Correct 16 ms 18068 KB Output is correct
35 Correct 56 ms 18988 KB Output is correct
36 Correct 18 ms 18900 KB Output is correct
37 Correct 21 ms 18928 KB Output is correct
38 Correct 74 ms 20200 KB Output is correct
39 Correct 21 ms 19908 KB Output is correct
40 Correct 22 ms 19924 KB Output is correct
41 Correct 94 ms 21484 KB Output is correct
42 Correct 24 ms 20948 KB Output is correct
43 Correct 23 ms 21048 KB Output is correct
44 Correct 129 ms 22868 KB Output is correct
45 Correct 28 ms 22252 KB Output is correct
46 Correct 29 ms 22224 KB Output is correct
47 Correct 167 ms 24520 KB Output is correct
48 Correct 30 ms 23568 KB Output is correct
49 Correct 32 ms 23380 KB Output is correct
50 Correct 196 ms 26256 KB Output is correct
51 Correct 33 ms 24844 KB Output is correct
52 Correct 36 ms 24904 KB Output is correct
53 Correct 258 ms 28148 KB Output is correct
54 Correct 38 ms 26320 KB Output is correct
55 Correct 48 ms 26392 KB Output is correct
56 Correct 285 ms 30288 KB Output is correct
57 Correct 42 ms 27984 KB Output is correct
58 Correct 44 ms 27908 KB Output is correct
59 Correct 343 ms 32388 KB Output is correct
60 Correct 53 ms 29712 KB Output is correct
61 Correct 51 ms 29776 KB Output is correct
62 Correct 394 ms 34696 KB Output is correct
63 Correct 211 ms 31760 KB Output is correct
64 Correct 366 ms 31632 KB Output is correct
65 Correct 288 ms 31672 KB Output is correct
66 Correct 253 ms 31688 KB Output is correct
67 Correct 235 ms 31568 KB Output is correct
68 Correct 130 ms 31612 KB Output is correct
69 Correct 132 ms 31708 KB Output is correct
70 Correct 118 ms 31700 KB Output is correct
71 Correct 109 ms 31600 KB Output is correct
72 Incorrect 93 ms 31588 KB Output isn't correct
73 Incorrect 192 ms 39692 KB Output isn't correct
74 Correct 217 ms 39620 KB Output is correct
75 Correct 259 ms 39644 KB Output is correct
76 Correct 238 ms 39664 KB Output is correct
77 Correct 219 ms 39628 KB Output is correct
78 Correct 240 ms 39596 KB Output is correct
79 Correct 181 ms 39628 KB Output is correct
80 Correct 216 ms 39812 KB Output is correct
81 Correct 222 ms 39628 KB Output is correct
82 Correct 201 ms 39720 KB Output is correct
83 Correct 313 ms 39612 KB Output is correct
84 Correct 281 ms 39584 KB Output is correct
85 Correct 307 ms 39640 KB Output is correct
86 Correct 316 ms 39644 KB Output is correct
87 Correct 288 ms 39644 KB Output is correct
88 Correct 324 ms 39660 KB Output is correct
89 Correct 311 ms 39664 KB Output is correct
90 Correct 319 ms 39660 KB Output is correct
91 Correct 337 ms 39632 KB Output is correct
92 Correct 332 ms 39696 KB Output is correct