oj.uz

Submission #491040

# Submission time Handle Problem Language Result Execution time Memory
491040 2021-11-30T05:16:24 Z sberens Mecho (IOI09_mecho) C++17
4 / 100
 14 ms 1100 KB 
#include <bits/stdc++.h>

#include <ext/pb_ds/assoc_container.hpp>

using namespace __gnu_pbds;
template<typename K> using hset = gp_hash_table<K, null_type>;
template<typename K, typename V> using hmap = gp_hash_table<K, V>;


using namespace std;

#define all(x) (x).begin(), (x).end()
#define pb push_back
#define eb emplace_back
#define smax(x, y) (x = max(x, y))
#define smin(x, y) (x = min(x, y))

#define FOR(i, a, b) for (int i = (a); i < (b); ++i)
#define F0R(i, a) FOR(i,0,a)
#define ROF(i, a, b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i, a) ROF(i,0,a)


using ll = long long;
using ld = long double;

template<typename T>
using vv = vector<vector<T>>;

using vi = vector<int>;
using ii = array<int, 2>;
using vii = vector<ii>;
using vvi = vv<int>;

using vll = vector<ll>;
using l2 = array<ll, 2>;
using vl2 = vector<l2>;
using vvll = vv<ll>;

template<typename T>
using minq = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using maxq = priority_queue<T>;

const ll M = 1000000007;
const ll infll = M * M;

template<typename IN>
IN discrete_binary_search(function<bool(IN)> predicate, IN low = 0, IN high = numeric_limits<IN>::max()) {
    while (low < high) {
        IN middle = low + (high - low) / 2; // todo std::midpoint in cpp 2020
        if (predicate(middle))
            high = middle;
        else low = middle + 1;
    }
    return low;
}

vii dirs{{1, 0}, {-1, 0}, {0, 1}, {0, -1}};

vii adjc(int x, int y) {
    vii res;
    for (auto [dx, dy] : dirs)
        res.pb({x + dx, y + dy});
    return res;
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n, s;
    cin >> n >> s;
    vv<char> g(n, vector<char>(n));
    int mr, mc, dr, dc;
    vii hives;
    F0R(i, n) {
        F0R(j, n) {
            char x;
            cin >> x;
            g[i][j] = x;
            if (x == 'M') {
                mr = i;
                mc = j;
            } else if (x == 'H') {
                hives.pb({i, j});
            } else if (x == 'D') {
                dr = i;
                dc = j;
            }
        }
    }
    cout << discrete_binary_search<int>([&](int t) -> bool {
        queue<ii> bees, bear;
        vvi seenbees(n, vi(n)), seenbear(n, vi(n));
        for (auto [r, c] : hives) {
            bees.push({r, c});
            seenbees[r][c] = 1;
        }
        bear.push({mr, mc});
        seenbear[mr][mc] = 1;

        auto upd_bees = [&]() -> void {
            queue<ii> nextbees;
            while (!bees.empty()) {
                cout << bees.size() + nextbees.size() << '\n';
                assert(bees.size() < n * n);
                auto [r, c] = bees.front(); bees.pop();
                for (auto [nr, nc] : adjc(r, c)) {
                    if (0 <= nr && nr < n && 0 <= nc && nc < n && seenbees[nr][nc] == 0 && (g[nr][nc] == 'G' || g[nr][nc] == 'M')) {
                        nextbees.push({nr, nc});
                        seenbees[nr][nc] = 1;
                    }
                }
            }
            swap(bees, nextbees);
//            bees = nextbees;
        };
        F0R(_, t) {
            upd_bees();
            if (bees.empty()) break;
        }
        while (!bees.empty()) {
            F0R(_, s) {
                queue<ii> nextbear;
                while (!bear.empty()) {
                    assert(bear.size() < n * n);
                    auto [r, c] = bear.front(); bear.pop();
                    if (seenbees[r][c] == 1) continue;
                    if (r == dr && c == dc) return false;
                    for (auto [nr, nc] : adjc(r, c)) {
                        if (0 <= nr && nr < n && 0 <= nc && nc < n && seenbear[nr][nc] == 0 && (g[nr][nc] == 'G' || g[nr][nc] == 'D') && seenbees[nr][nc] == 0) {
                            nextbear.push({nr, nc});
                            seenbear[nr][nc] = 1;
                        }
                    }
                }
                swap(bear, nextbear);
                if (bear.empty()) return true;
//                bear = nextbear;
            }
            upd_bees();
        }
        return true;
    }, 0, 0) - 1 << '\n';

}

Subtask #1
4.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Incorrect 0 ms 204 KB Output isn't correct
3 Incorrect 0 ms 204 KB Output isn't correct
4 Incorrect 0 ms 204 KB Output isn't correct
5 Incorrect 0 ms 204 KB Output isn't correct
6 Incorrect 0 ms 204 KB Output isn't correct
7 Incorrect 10 ms 972 KB Output isn't correct
8 Correct 0 ms 204 KB Output is correct
9 Incorrect 0 ms 204 KB Output isn't correct
10 Incorrect 0 ms 204 KB Output isn't correct
11 Incorrect 1 ms 204 KB Output isn't correct
12 Incorrect 1 ms 204 KB Output isn't correct
13 Incorrect 0 ms 204 KB Output isn't correct
14 Correct 1 ms 204 KB Output is correct
15 Incorrect 0 ms 204 KB Output isn't correct
16 Incorrect 0 ms 204 KB Output isn't correct
17 Incorrect 1 ms 204 KB Output isn't correct
18 Incorrect 0 ms 204 KB Output isn't correct
19 Incorrect 1 ms 204 KB Output isn't correct
20 Incorrect 0 ms 204 KB Output isn't correct
21 Incorrect 0 ms 204 KB Output isn't correct
22 Incorrect 0 ms 204 KB Output isn't correct
23 Incorrect 0 ms 204 KB Output isn't correct
24 Incorrect 0 ms 204 KB Output isn't correct
25 Incorrect 0 ms 204 KB Output isn't correct
26 Incorrect 0 ms 204 KB Output isn't correct
27 Incorrect 0 ms 204 KB Output isn't correct
28 Incorrect 1 ms 204 KB Output isn't correct
29 Incorrect 1 ms 204 KB Output isn't correct
30 Incorrect 0 ms 204 KB Output isn't correct
31 Incorrect 1 ms 204 KB Output isn't correct
32 Incorrect 1 ms 204 KB Output isn't correct
33 Incorrect 3 ms 448 KB Output isn't correct
34 Incorrect 2 ms 332 KB Output isn't correct
35 Incorrect 3 ms 332 KB Output isn't correct
36 Incorrect 3 ms 460 KB Output isn't correct
37 Incorrect 3 ms 460 KB Output isn't correct
38 Incorrect 3 ms 460 KB Output isn't correct
39 Incorrect 4 ms 460 KB Output isn't correct
40 Incorrect 3 ms 460 KB Output isn't correct
41 Incorrect 3 ms 460 KB Output isn't correct
42 Incorrect 4 ms 460 KB Output isn't correct
43 Incorrect 5 ms 460 KB Output isn't correct
44 Incorrect 4 ms 460 KB Output isn't correct
45 Incorrect 5 ms 588 KB Output isn't correct
46 Incorrect 5 ms 588 KB Output isn't correct
47 Incorrect 6 ms 588 KB Output isn't correct
48 Incorrect 6 ms 588 KB Output isn't correct
49 Incorrect 6 ms 684 KB Output isn't correct
50 Incorrect 6 ms 588 KB Output isn't correct
51 Incorrect 7 ms 752 KB Output isn't correct
52 Incorrect 7 ms 716 KB Output isn't correct
53 Incorrect 7 ms 716 KB Output isn't correct
54 Incorrect 9 ms 820 KB Output isn't correct
55 Incorrect 9 ms 716 KB Output isn't correct
56 Incorrect 8 ms 816 KB Output isn't correct
57 Incorrect 10 ms 896 KB Output isn't correct
58 Incorrect 10 ms 844 KB Output isn't correct
59 Incorrect 9 ms 844 KB Output isn't correct
60 Incorrect 10 ms 972 KB Output isn't correct
61 Incorrect 11 ms 844 KB Output isn't correct
62 Incorrect 10 ms 972 KB Output isn't correct
63 Incorrect 10 ms 972 KB Output isn't correct
64 Incorrect 10 ms 980 KB Output isn't correct
65 Incorrect 10 ms 972 KB Output isn't correct
66 Incorrect 10 ms 972 KB Output isn't correct
67 Correct 10 ms 972 KB Output is correct
68 Incorrect 10 ms 968 KB Output isn't correct
69 Incorrect 11 ms 972 KB Output isn't correct
70 Incorrect 11 ms 972 KB Output isn't correct
71 Incorrect 11 ms 972 KB Output isn't correct
72 Incorrect 10 ms 976 KB Output isn't correct
73 Incorrect 14 ms 972 KB Output isn't correct
74 Incorrect 13 ms 972 KB Output isn't correct
75 Incorrect 10 ms 972 KB Output isn't correct
76 Incorrect 10 ms 1028 KB Output isn't correct
77 Incorrect 10 ms 972 KB Output isn't correct
78 Correct 10 ms 972 KB Output is correct
79 Incorrect 10 ms 972 KB Output isn't correct
80 Incorrect 10 ms 972 KB Output isn't correct
81 Incorrect 11 ms 972 KB Output isn't correct
82 Incorrect 11 ms 1100 KB Output isn't correct
83 Incorrect 10 ms 972 KB Output isn't correct
84 Incorrect 10 ms 972 KB Output isn't correct
85 Incorrect 10 ms 972 KB Output isn't correct
86 Incorrect 10 ms 972 KB Output isn't correct
87 Incorrect 10 ms 972 KB Output isn't correct
88 Incorrect 14 ms 972 KB Output isn't correct
89 Incorrect 13 ms 972 KB Output isn't correct
90 Incorrect 10 ms 964 KB Output isn't correct
91 Incorrect 10 ms 964 KB Output isn't correct
92 Incorrect 11 ms 972 KB Output isn't correct