oj.uz

Submission #969610

# Submission time Handle Problem Language Result Execution time Memory
969610 2024-04-25T11:04:50 Z rahidilbayramli Mecho (IOI09_mecho) C++17
100 / 100
 140 ms 12684 KB 
#pragma GCC optimize("-O3")
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define vl vector<ll>
#define vi vector<int>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define pb push_back
#define p_b pop_back
#define f first
#define s second
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
const ll sz = 850;
char grid[sz][sz];
ll dist[sz][sz], ch[sz][sz], n, s, i, j, k;
ll dx[] = {0, 1, 0, -1};
ll dy[] = {1, 0, -1, 0};
pll st, en;
ll bfs(ll mid)
{
    if(dist[st.f][st.s] - mid * s <= 0)
        return 0;
    for(i = 1; i <= n; i++)
    {
        for(j = 1; j <= n; j++)
            ch[i][j] = 0;
    }
    queue<pll>q;
    q.push(st);
    while(!q.empty())
    {
        pll node = q.front();
        q.pop();
        for(k = 0; k < 4; k++)
        {
            pll nnode = {node.f + dx[k], node.s + dy[k]};
            if(nnode.f >= 1 && nnode.f <= n && nnode.s >= 1 && nnode.s <= n)
            {
                if(ch[nnode.f][nnode.s] == 0 && grid[nnode.f][nnode.s] != 'T' && grid[nnode.f][nnode.s] != 'M' && dist[nnode.f][nnode.s] - mid * s > ch[node.f][node.s] + 1)
                {
                    ch[nnode.f][nnode.s] = ch[node.f][node.s] + 1;
                    q.push(nnode);
                }
            }
        }
    }
    if(ch[en.f][en.s] > 0)
        return 1;
    return 0;
}
void solve()
{
    cin >> n >> s;
    queue<pll>q;
    for(i = 1; i <= n; i++)
    {
        for(j = 1; j <= n; j++){
            cin >> grid[i][j];
            if(grid[i][j] == 'M')
                st = {i, j};
            else    if(grid[i][j] == 'D')
                en = {i, j};
            else    if(grid[i][j] == 'H')
                q.push({i, j});
        }
    }
    while(!q.empty())
    {
        pll node = q.front();
        q.pop();
        for(k = 0; k < 4; k++)
        {
            pll nnode = {node.f + dx[k], node.s + dy[k]};
            if(nnode.f >= 1 && nnode.f <= n && nnode.s >= 1 && nnode.s <= n)
            {
                if(dist[nnode.f][nnode.s] == 0 && grid[nnode.f][nnode.s] != 'H' && grid[nnode.f][nnode.s] != 'T' && grid[nnode.f][nnode.s] != 'D')
                {
                    dist[nnode.f][nnode.s] = dist[node.f][node.s] + s;
                    q.push(nnode);
                }
            }
        }
    }
    dist[en.f][en.s] = LLONG_MAX;
    ll l = 0, r = 1000000000, ans = -1;
    while(l <= r)
    {
        ll mid = (l + r) / 2;
        if(bfs(mid))
        {
            ans = max(ans, mid);
            l = mid + 1;
        }
        else
            r = mid - 1;
    }
    cout << ans << "\n";
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    ll tests = 1;
    //cin >> tests;
    while(tests--)
    {
        solve();
    }
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 464 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 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 1 ms 460 KB Output is correct
7 Correct 59 ms 11856 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 1 ms 2908 KB Output is correct
13 Correct 1 ms 2764 KB Output is correct
14 Correct 1 ms 2904 KB Output is correct
15 Correct 1 ms 600 KB Output is correct
16 Correct 1 ms 604 KB Output is correct
17 Correct 1 ms 464 KB Output is correct
18 Correct 0 ms 604 KB Output is correct
19 Correct 1 ms 2652 KB Output is correct
20 Correct 1 ms 2652 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 1 ms 2768 KB Output is correct
24 Correct 1 ms 2908 KB Output is correct
25 Correct 1 ms 2908 KB Output is correct
26 Correct 1 ms 2908 KB Output is correct
27 Correct 1 ms 2908 KB Output is correct
28 Correct 1 ms 2908 KB Output is correct
29 Correct 1 ms 2772 KB Output is correct
30 Correct 1 ms 2908 KB Output is correct
31 Correct 1 ms 2904 KB Output is correct
32 Correct 1 ms 3104 KB Output is correct
33 Correct 5 ms 6984 KB Output is correct
34 Correct 5 ms 7004 KB Output is correct
35 Correct 13 ms 7256 KB Output is correct
36 Correct 7 ms 7260 KB Output is correct
37 Correct 8 ms 7516 KB Output is correct
38 Correct 17 ms 7768 KB Output is correct
39 Correct 6 ms 7516 KB Output is correct
40 Correct 6 ms 8028 KB Output is correct
41 Correct 26 ms 8284 KB Output is correct
42 Correct 7 ms 8028 KB Output is correct
43 Correct 6 ms 8284 KB Output is correct
44 Correct 31 ms 8540 KB Output is correct
45 Correct 8 ms 8280 KB Output is correct
46 Correct 8 ms 8784 KB Output is correct
47 Correct 35 ms 9096 KB Output is correct
48 Correct 9 ms 8540 KB Output is correct
49 Correct 10 ms 9044 KB Output is correct
50 Correct 39 ms 9308 KB Output is correct
51 Correct 13 ms 8976 KB Output is correct
52 Correct 12 ms 9560 KB Output is correct
53 Correct 55 ms 9964 KB Output is correct
54 Correct 14 ms 9564 KB Output is correct
55 Correct 15 ms 10308 KB Output is correct
56 Correct 54 ms 10672 KB Output is correct
57 Correct 13 ms 10328 KB Output is correct
58 Correct 16 ms 10836 KB Output is correct
59 Correct 72 ms 11428 KB Output is correct
60 Correct 19 ms 11100 KB Output is correct
61 Correct 17 ms 11704 KB Output is correct
62 Correct 120 ms 12116 KB Output is correct
63 Correct 84 ms 12140 KB Output is correct
64 Correct 140 ms 12112 KB Output is correct
65 Correct 131 ms 12112 KB Output is correct
66 Correct 85 ms 12108 KB Output is correct
67 Correct 80 ms 12180 KB Output is correct
68 Correct 38 ms 12256 KB Output is correct
69 Correct 36 ms 12112 KB Output is correct
70 Correct 27 ms 12112 KB Output is correct
71 Correct 30 ms 12288 KB Output is correct
72 Correct 26 ms 12052 KB Output is correct
73 Correct 29 ms 12684 KB Output is correct
74 Correct 39 ms 12628 KB Output is correct
75 Correct 45 ms 12584 KB Output is correct
76 Correct 39 ms 12636 KB Output is correct
77 Correct 44 ms 12636 KB Output is correct
78 Correct 41 ms 12592 KB Output is correct
79 Correct 37 ms 12500 KB Output is correct
80 Correct 40 ms 12636 KB Output is correct
81 Correct 41 ms 12616 KB Output is correct
82 Correct 38 ms 12628 KB Output is correct
83 Correct 48 ms 12368 KB Output is correct
84 Correct 42 ms 12380 KB Output is correct
85 Correct 43 ms 12380 KB Output is correct
86 Correct 57 ms 12628 KB Output is correct
87 Correct 44 ms 12372 KB Output is correct
88 Correct 51 ms 12368 KB Output is correct
89 Correct 63 ms 12464 KB Output is correct
90 Correct 52 ms 12528 KB Output is correct
91 Correct 48 ms 12368 KB Output is correct
92 Correct 50 ms 12284 KB Output is correct