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Submission #759182

# Submission time Handle Problem Language Result Execution time Memory
759182 2023-06-15T20:23:51 Z Blagoj Mecho (IOI09_mecho) C++14
84 / 100
 125 ms 7268 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
#define endl '\n'
#define ll long long
#define all(x) x.begin(), x.end()
 
ll n, s, times[810][810];
vector<string> v(810);
pair<ll, ll> st, en;
 
const ll dx[4] = {0, 0, -1, 1};
const ll dy[4] = {-1, 1, 0, 0};
 
inline bool valid(ll x, ll y) {
    return (x >= 0 && x < n && y >= 0 && y < n && v[x][y] != 'T');
}
 
bool check(ll m) {
    if (!(m < times[st.first][st.second])) return 0;
    queue<pair<ll, ll>> q;
    q.push(st);
    bool vis[n + 2][n + 2];
    memset(vis, 0, sizeof(vis));
    vis[st.first][st.second] = 1;
    ll moves = 0;
    do {
        ll sz = q.size();
        while (sz--) {
            ll x = q.front().first, y = q.front().second;
            q.pop();
            for (ll d = 0; d < 4; d++) {
                ll nx = x + dx[d], ny = y + dy[d];
                if (valid(nx, ny) && ((m + (moves + 1 == s)) < times[nx][ny] || ((m + (moves + 1 == s)) == times[nx][ny] && make_pair(nx, ny) == en)) && !vis[nx][ny]) {
                    vis[nx][ny] = 1;
                    q.push({nx, ny});
                    if (make_pair(nx, ny) == en) return 1;
                }
            }
        }
        moves++;
        if (moves >= s) {
            moves = 0;
            m++;
        }
    }
    while (q.size() > 0);
    return 0;
}
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> s;
    queue<pair<ll, ll>> h;
 
    for (ll i = 0; i < n; i++) {
        cin >> v[i];
        for (ll j = 0; j < n; j++) {
            times[i][j] = n * n + 1000;
            if (v[i][j] == 'M') st = {i, j};
            if (v[i][j] == 'H') {
                h.push({i, j});
                times[i][j] = 0;
            }
            if (v[i][j] == 'D') en = {i, j};
        }
    }
 
    ll mx = 0;
    while (h.size() > 0) {
        ll x = h.front().first, y = h.front().second;
        h.pop();
        for (ll d = 0; d < 4; d++) {
            ll nx = x + dx[d], ny = y + dy[d];
            if (valid(nx, ny) && times[x][y] + 1 < times[nx][ny] && v[nx][ny] != 'D') {
                times[nx][ny] = times[x][y] + 1;
                mx = max(mx, times[nx][ny]);
                h.push({nx, ny});
            }
        }
    }

    ll l = 0, r = mx;
    while (l + 1 < r) {
		ll m = (l + r) / 2;
		if (check(m)) l = m;
		else r = m;
	}
 
    cout << l;
}

Subtask #1
84.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 77 ms 6840 KB Output is correct
8 Incorrect 0 ms 340 KB Output isn't correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Incorrect 1 ms 596 KB Output isn't correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 0 ms 468 KB Output is correct
21 Correct 0 ms 468 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 596 KB Output is correct
26 Correct 1 ms 596 KB Output is correct
27 Correct 1 ms 596 KB Output is correct
28 Correct 1 ms 596 KB Output is correct
29 Correct 1 ms 596 KB Output is correct
30 Correct 1 ms 596 KB Output is correct
31 Correct 1 ms 596 KB Output is correct
32 Correct 1 ms 596 KB Output is correct
33 Correct 2 ms 2772 KB Output is correct
34 Correct 3 ms 2772 KB Output is correct
35 Correct 17 ms 2828 KB Output is correct
36 Correct 4 ms 3156 KB Output is correct
37 Correct 3 ms 3156 KB Output is correct
38 Correct 23 ms 3224 KB Output is correct
39 Correct 4 ms 3612 KB Output is correct
40 Correct 4 ms 3540 KB Output is correct
41 Correct 29 ms 3564 KB Output is correct
42 Correct 4 ms 3924 KB Output is correct
43 Correct 4 ms 3924 KB Output is correct
44 Correct 37 ms 3928 KB Output is correct
45 Correct 5 ms 4436 KB Output is correct
46 Correct 5 ms 4436 KB Output is correct
47 Correct 48 ms 4436 KB Output is correct
48 Correct 6 ms 4820 KB Output is correct
49 Correct 6 ms 4820 KB Output is correct
50 Correct 54 ms 4820 KB Output is correct
51 Correct 7 ms 5332 KB Output is correct
52 Correct 7 ms 5332 KB Output is correct
53 Correct 64 ms 5312 KB Output is correct
54 Correct 8 ms 5716 KB Output is correct
55 Correct 7 ms 5716 KB Output is correct
56 Correct 76 ms 5716 KB Output is correct
57 Correct 9 ms 6220 KB Output is correct
58 Correct 14 ms 6228 KB Output is correct
59 Correct 125 ms 6348 KB Output is correct
60 Correct 9 ms 6612 KB Output is correct
61 Correct 10 ms 6612 KB Output is correct
62 Correct 100 ms 6740 KB Output is correct
63 Correct 72 ms 6712 KB Output is correct
64 Correct 119 ms 6708 KB Output is correct
65 Correct 123 ms 6740 KB Output is correct
66 Correct 92 ms 6708 KB Output is correct
67 Incorrect 86 ms 6712 KB Output isn't correct
68 Correct 34 ms 6740 KB Output is correct
69 Correct 34 ms 6672 KB Output is correct
70 Correct 26 ms 6672 KB Output is correct
71 Correct 27 ms 6788 KB Output is correct
72 Correct 22 ms 6680 KB Output is correct
73 Correct 24 ms 7172 KB Output is correct
74 Correct 63 ms 7268 KB Output is correct
75 Correct 51 ms 7144 KB Output is correct
76 Correct 55 ms 7244 KB Output is correct
77 Correct 60 ms 7264 KB Output is correct
78 Incorrect 64 ms 7112 KB Output isn't correct
79 Correct 41 ms 7124 KB Output is correct
80 Correct 47 ms 7124 KB Output is correct
81 Correct 60 ms 7220 KB Output is correct
82 Correct 49 ms 7200 KB Output is correct
83 Correct 63 ms 7028 KB Output is correct
84 Correct 63 ms 7124 KB Output is correct
85 Correct 66 ms 7032 KB Output is correct
86 Correct 68 ms 7104 KB Output is correct
87 Correct 65 ms 7124 KB Output is correct
88 Correct 76 ms 7116 KB Output is correct
89 Correct 69 ms 6996 KB Output is correct
90 Correct 75 ms 7024 KB Output is correct
91 Correct 74 ms 6932 KB Output is correct
92 Correct 73 ms 6944 KB Output is correct