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답안 #771819

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
771819 2023-07-03T09:51:01 Z green_gold_dog Maze (JOI23_ho_t3) C++17
35 / 100
 2000 ms 89588 KB 
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

const ll INF = 1'000'000'000;

template<typename T>
bool assign_min(T& a, T b) {
        if (a > b) {
                a = b;
                return true;
        }
        return false;
}

template<typename T>
bool assign_max(T& a, T b) {
        if (a < b) {
                a = b;
                return true;
        }
        return false;
}

struct segment_tree {
        vector<bool> tree;
        ll size;
        segment_tree(ll n) {
                size = 1;
                while (size < n) {
                        size *= 2;
                }
                tree.resize(size * 2, false);
        }
        vector<ll> set(ll l, ll r) {
                vector<ll> ans;
                set(1, 0, size, l, r, ans);
                return ans;
        }
        void set(ll v, ll l, ll r, ll ql, ll qr, vector<ll>& ans) {
                if (tree[v]) {
                        return;
                }
                if (r <= ql || qr <= l) {
                        return;
                }
                if (r - l == 1) {
                        ans.push_back(l);
                        tree[v] = true;
                        return;
                }
                ll mid = (l + r) / 2;
                set(v * 2, l, mid, ql, qr, ans);
                set(v * 2 + 1, mid, r, ql, qr, ans);
                tree[v] = tree[v * 2] && tree[v * 2 + 1];
        }
};

struct segment_tree_am {
        vector<ll> m, tree;
        ll size;
        segment_tree_am(ll n) {
                size = 1;
                while (size < n) {
                        size *= 2;
                }
                m.resize(size * 2, 0);
                tree.resize(size * 2, 0);
        }
        bool get(ll l, ll r) {
                return get(1, 0, size, l, r);
        }
        bool get(ll v, ll l, ll r, ll ql, ll qr) {
                if (tree[v] != 0) {
                        return false;
                }
                if (ql <= l && r <= qr) {
                        return true;
                }
                if (qr <= l || r <= ql) {
                        return false;
                }
                ll mid = (l + r) / 2;
                return get(v * 2, l, mid, ql, qr) || get(v * 2 + 1, mid, r, ql, qr);
        }
        void add(ll l, ll r, ll x) {
                add(1, 0, size, l, r, x);
        }
        void add(ll v, ll l, ll r, ll ql, ll qr, ll x) {
                if (ql <= l && r <= qr) {
                        tree[v] += x;
                        m[v] += x;
                        return;
                }
                if (qr <= l || r <= ql) {
                        return;
                }
                ll mid = (l + r) / 2;
                add(v * 2, l, mid, ql, qr, x);
                add(v * 2 + 1, mid, r, ql, qr, x);
                tree[v] = min(tree[v * 2], tree[v * 2 + 1]) + m[v];
        }
        ll find_first(ll l, ll r) {
                if (!get(l, r)) {
                        return r;
                }
                return find_first(1, 0, size, l, r);
        }
        ll find_first(ll v, ll l, ll r, ll ql, ll qr) {
                if (r - l == 1) {
                        return l;
                }
                ll mid = (l + r) / 2;
                if (get(v * 2, l, mid, ql, qr)) {
                        return find_first(v * 2, l, mid, ql, qr);
                } else {
                        return find_first(v * 2 + 1, mid, r, ql, qr);
                }
        }
};

void solve() {
        ll n, r, c;
        cin >> r >> c >> n;
        ll sx, sy, gx, gy;
        cin >> sx >> sy >> gx >> gy;
        sx--;
        sy--;
        gx--;
        gy--;
        vector<vector<bool>> arr(r, vector<bool>(c, false));
        vector<vector<bool>> used(r, vector<bool>(c, false));
        vector<segment_tree> dist(r, segment_tree(c));
        for (ll i = 0; i < r; i++) {
                string s;
                cin >> s;
                for (ll j = 0; j < c; j++) {
                        if (s[j] == '.') {
                                arr[i][j] = true;
                        }
                }
        }
        vector<pair<ll, ll>> now;
        now.emplace_back(sx, sy);
        used[sx][sy] = true;
        ll na = 0;
        while (true) {
                vector<pair<ll, ll>> nu;
                vector<vector<pair<ll, ll>>> all(r * 2);
                while (!now.empty()) {
                        auto[x, y] = now.back();
                        nu.emplace_back(x, y);
                        if (x == gx && y == gy) {
                                cout << na << '\n';
                                return;
                        }
                        now.pop_back();
                        if (x > 0 && arr[x - 1][y]) {
                                if (!used[x - 1][y]) {
                                        used[x - 1][y] = true;
                                        now.emplace_back(x - 1, y);
                                }
                        }
                        if (x + 1 < r && arr[x + 1][y]) {
                                if (!used[x + 1][y]) {
                                        used[x + 1][y] = true;
                                        now.emplace_back(x + 1, y);
                                }
                        }
                        if (y > 0 && arr[x][y - 1]) {
                                if (!used[x][y - 1]) {
                                        used[x][y - 1] = true;
                                        now.emplace_back(x, y - 1);
                                }
                        }
                        if (y + 1 < c && arr[x][y + 1]) {
                                if (!used[x][y + 1]) {
                                        used[x][y + 1] = true;
                                        now.emplace_back(x, y + 1);
                                }
                        }
                        all[max(x - n + 1, 0ll) * 2].emplace_back(max(y - n, 0ll), min(y + n + 1, c));
                        all[(min(x + n, r) - 1) * 2 + 1].emplace_back(max(y - n, 0ll), min(y + n + 1, c));
                }
                na++;
                for (auto[x, y] : nu) {
                        if (x - n >= 0) {
                                ll i = x - n;
                                for (auto j : dist[i].set(max(y - n + 1, 0ll), min(y + n, c))) {
                                        if (!used[i][j]) {
                                                used[i][j] = true;
                                                now.emplace_back(i, j);
                                        }
                                }
                        }
                        if (x + n < r) {
                                ll i = x + n;
                                for (auto j : dist[i].set(max(y - n + 1, 0ll), min(y + n, c))) {
                                        if (!used[i][j]) {
                                                used[i][j] = true;
                                                now.emplace_back(i, j);
                                        }
                                }
                        }
                }
                segment_tree_am sta(c);
                multiset<ll> nnn;
                nnn.insert(c);
                for (ll i = 0; i < r; i++) {
                        for (auto[l, r] : all[i * 2]) {
                                sta.add(l, r, 1);
                                nnn.insert(l);
                        }
                        ll nn = 0;
                        while (nn < c) {
                                nn = *nnn.lower_bound(nn);
                                ll en = sta.find_first(nn, c);
                                for (auto j : dist[i].set(nn, en)) {
                                        if (!used[i][j]) {
                                                used[i][j] = true;
                                                now.emplace_back(i, j);
                                        }
                                }
                                nn = en;
                        }
                        for (auto[l, r] : all[i * 2 + 1]) {
                                sta.add(l, r, -1);
                                nnn.erase(nnn.find(l));
                        }
                }
        }
}

int main() {
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        cout.tie(0);
        solve();
}

Subtask #1
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 320 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 44 ms 492 KB Output is correct
20 Execution timed out 2077 ms 2848 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #2
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 320 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 368 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 320 KB Output is correct
30 Correct 1 ms 316 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 320 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 316 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 316 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 320 KB Output is correct
18 Correct 1 ms 316 KB Output is correct
19 Correct 1 ms 316 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 320 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 5 ms 468 KB Output is correct
26 Correct 3 ms 3140 KB Output is correct
27 Correct 3 ms 3324 KB Output is correct
28 Correct 3 ms 1556 KB Output is correct
29 Correct 6 ms 4424 KB Output is correct
30 Correct 7 ms 4560 KB Output is correct
31 Correct 11 ms 1136 KB Output is correct
32 Correct 1 ms 472 KB Output is correct
33 Correct 2 ms 456 KB Output is correct
34 Correct 1 ms 596 KB Output is correct
35 Correct 5 ms 5056 KB Output is correct
36 Correct 3 ms 2436 KB Output is correct
37 Correct 7 ms 4804 KB Output is correct
38 Correct 10 ms 6836 KB Output is correct
39 Correct 20 ms 17000 KB Output is correct
40 Correct 49 ms 30804 KB Output is correct
41 Correct 92 ms 88260 KB Output is correct
42 Correct 58 ms 47472 KB Output is correct
43 Correct 117 ms 89588 KB Output is correct
44 Correct 83 ms 77308 KB Output is correct
45 Correct 33 ms 20752 KB Output is correct
46 Correct 28 ms 15092 KB Output is correct

Subtask #4
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 320 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 368 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 320 KB Output is correct
30 Correct 1 ms 316 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 36 ms 504 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 3 ms 468 KB Output is correct
36 Correct 4 ms 468 KB Output is correct
37 Execution timed out 2069 ms 2864 KB Time limit exceeded
38 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 320 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 212 KB Output is correct
25 Correct 1 ms 368 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 1 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 1 ms 320 KB Output is correct
30 Correct 1 ms 316 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 36 ms 504 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 3 ms 468 KB Output is correct
36 Correct 4 ms 468 KB Output is correct
37 Execution timed out 2069 ms 2864 KB Time limit exceeded
38 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 320 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 44 ms 492 KB Output is correct
20 Execution timed out 2077 ms 2848 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #7
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 320 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 44 ms 492 KB Output is correct
20 Execution timed out 2077 ms 2848 KB Time limit exceeded
21 Halted 0 ms 0 KB -

Subtask #8
0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 ms 320 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 0 ms 320 KB Output is correct
12 Correct 1 ms 316 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 320 KB Output is correct
19 Correct 44 ms 492 KB Output is correct
20 Execution timed out 2077 ms 2848 KB Time limit exceeded
21 Halted 0 ms 0 KB -