oj.uz

Submission #1054548

# Submission time Handle Problem Language Result Execution time Memory
1054548 2024-08-12T10:35:59 Z Nonoze Mecho (IOI09_mecho) C++17
100 / 100
 875 ms 47832 KB 
/*
*	Author: Nonoze
*	Created: Wednesday 07/08/2024
*/
#include <bits/stdc++.h>
using namespace std;


namespace std {

// https://judge.yosupo.jp/submission/193613
struct IOPre {
    static constexpr int TEN = 10, SZ = TEN * TEN * TEN * TEN;
    std::array<char, 4 * SZ> num;
    constexpr IOPre() : num{} {
        for (int i = 0; i < SZ; i++) for (int n = i, j = 3; j >= 0; j--) num[i * 4 + j] = n % TEN + '0', n /= TEN;
    }
};

struct IO {
#if !HAVE_DECL_FREAD_UNLOCKED
    #define fread_unlocked fread
#endif
#if !HAVE_DECL_FWRITE_UNLOCKED
    #define fwrite_unlocked fwrite
#endif
    static constexpr int SZ = 1 << 17, LEN = 32, TEN = 10, HUNDRED = TEN * TEN,
                         THOUSAND = HUNDRED * TEN, TENTHOUSAND = THOUSAND * TEN,
                         MAGIC_MULTIPLY = 205, MAGIC_SHIFT = 11, MASK = 15,
                         TWELVE = 12, SIXTEEN = 16;
    static constexpr IOPre io_pre = {};
    std::array<char, SZ> input_buffer, output_buffer;
    int input_ptr_left, input_ptr_right, output_ptr_right;

    IO() : input_buffer{}, output_buffer{}, input_ptr_left{}, input_ptr_right{}, output_ptr_right{} {}
    IO(const IO&) = delete;
    IO(IO&&) = delete;
    IO& operator=(const IO&) = delete;
    IO& operator=(IO&&) = delete;
    ~IO() { flush(); }

    template<typename T> static constexpr bool is_char_v    = std::is_same_v<T, char>;
    template<typename T> static constexpr bool is_bool_v    = std::is_same_v<T, bool>;
    template<typename T> static constexpr bool is_string_v  =
            std::is_same_v<T, std::string> || std::is_same_v<T, const char*> ||
            std::is_same_v<T, char*> || std::is_same_v< std::decay_t<T>, char*>;
    template<typename T> static constexpr bool is_default_v =
            is_char_v<T> || is_bool_v<T> || is_string_v<T> || std::is_integral_v<T>;

    inline void load() {
        memmove(std::begin(input_buffer),
                std::begin(input_buffer) + input_ptr_left,
                input_ptr_right - input_ptr_left);
        input_ptr_right =
            input_ptr_right - input_ptr_left +
            fread_unlocked(
                std::begin(input_buffer) + input_ptr_right - input_ptr_left, 1,
                SZ - input_ptr_right + input_ptr_left, stdin);
        input_ptr_left = 0;
    }

    inline void read_char(char& c) {
        if (input_ptr_left + LEN > input_ptr_right) load();
        c = input_buffer[input_ptr_left++];
    }
    inline void read_string(std::string& x) {
        char c;
        while (read_char(c), c < '!') continue;
        x = c;
        while (read_char(c), c >= '!') x += c;
    }
    template<typename T>
    inline std::enable_if_t<std::is_integral_v<T>, void> read_int(T& x) {
        if (input_ptr_left + LEN > input_ptr_right) load();
        char c = 0;
        do c = input_buffer[input_ptr_left++];
        while (c < '-');
        [[maybe_unused]] bool minus = false;
        if constexpr (std::is_signed<T>::value == true)
            if (c == '-') minus = true, c = input_buffer[input_ptr_left++];
        x = 0;
        while (c >= '0')
            x = x * TEN + (c & MASK), c = input_buffer[input_ptr_left++];
        if constexpr (std::is_signed<T>::value == true)
            if (minus) x = -x;
    }

    inline void skip_space() {
        if (input_ptr_left + LEN > input_ptr_right) load();
        while (input_buffer[input_ptr_left] <= ' ') input_ptr_left++;
    }

    inline void flush() {
        fwrite_unlocked(std::begin(output_buffer), 1, output_ptr_right, stdout);
        output_ptr_right = 0;
    }

    inline void write_char(char c) {
        if (output_ptr_right > SZ - LEN) flush();
        output_buffer[output_ptr_right++] = c;
    }

    inline void write_bool(bool b) {
        if (output_ptr_right > SZ - LEN) flush();
        output_buffer[output_ptr_right++] = b ? '1' : '0';
    }

    inline void write_string(const std::string& s) {
        for (auto x : s) write_char(x);
    }

    inline void write_string(const char* s) {
        while (*s) write_char(*s++);
    }

    inline void write_string(char* s) {
        while (*s) write_char(*s++);
    }

    template <typename T>
    inline std::enable_if_t< std::is_integral_v<T>, void> write_int(T x) {
        if (output_ptr_right > SZ - LEN) flush();
        if (!x) {
            output_buffer[output_ptr_right++] = '0';
            return;
        }
        if constexpr (std::is_signed_v<T>) if (x < 0) output_buffer[output_ptr_right++] = '-', x = -x;
        int i = TWELVE;
        std::array<char, SIXTEEN> buf{};
        for (; x >= TENTHOUSAND; x /= TENTHOUSAND, i -= 4)
            memcpy(std::begin(buf) + i, std::begin(io_pre.num) + (x % TENTHOUSAND) * 4, 4);
        if (x < HUNDRED) {
            if (x < TEN) output_buffer[output_ptr_right++] = '0' + x;
            else {
                uint32_t q = (uint32_t(x) * MAGIC_MULTIPLY) >> MAGIC_SHIFT;
                uint32_t r = uint32_t(x) - q * TEN;
                output_buffer[output_ptr_right++] = '0' + q;
                output_buffer[output_ptr_right++] = '0' + r;
            }
        } else {
            if (x < THOUSAND) 
                memcpy(std::begin(output_buffer) + output_ptr_right, std::begin(io_pre.num) + (x << 2) + 1, 3),
                output_ptr_right += 3;
            else
                memcpy(std::begin(output_buffer) + output_ptr_right, std::begin(io_pre.num) + (x << 2), 4),
                output_ptr_right += 4;
        }
        memcpy(std::begin(output_buffer) + output_ptr_right, std::begin(buf) + i + 4, TWELVE - i);
        output_ptr_right += TWELVE - i;
    }

    template <typename T_>
    std::enable_if_t<(is_default_v< std::remove_cv_t< std::remove_reference_t<T_> > >), IO&> operator<<(T_&& x) {
        using T = std::remove_cv_t< std::remove_reference_t<T_> >;
        if constexpr (is_bool_v<T>) write_bool(x);
        else if constexpr (is_string_v<T>) write_string(x);
        else if constexpr (is_char_v<T>) write_char(x);
        else if constexpr (std::is_integral_v<T>) write_int(x);
        return *this;
    }

    template<typename T>
    std::enable_if_t<(is_default_v<T> && !is_bool_v<T>), IO&> operator>>(T& x) {
        if constexpr (is_string_v<T>) read_string(x);
        else if constexpr (is_char_v<T>) read_char(x);
        else if constexpr (std::is_integral_v<T>) read_int(x);
        return *this;
    }

    IO* tie(std::nullptr_t) { return this; }
    void sync_with_stdio(bool) {}
} io;

} // namespace std

using std::io;

#define cin io
#define cout io


#ifndef _IN_LOCAL
	#define dbg(...)
#endif

#define endl '\n'
#define endlfl '\n' << flush
#define quit(x) return (void)(cout << x << endl)

template<typename T> void read(T& x) { cin >> x; }
template<typename T1, typename T2> void read(pair<T1, T2>& p) { read(p.first), read(p.second); }
template<typename T> void read(vector<T>& v) { for (auto& x : v) read(x); }
template<typename T1, typename T2> void read(T1& x, T2& y) { read(x), read(y);}
template<typename T1, typename T2, typename T3> void read(T1& x, T2& y, T3& z) { read(x), read(y), read(z); }
template<typename T1, typename T2, typename T3, typename T4> void read(T1& x, T2& y, T3& z, T4& zz) { read(x), read(y), read(z), read(zz); }
template<typename T> void print(vector<T>& v) { for (auto& x : v) cout << x << ' '; cout << endl; }


#define sz(x) (int)(x.size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define cmin(a, b) a = min(a, b)
#define cmax(a, b) a = max(a, b)

#define int long long
const int inf = numeric_limits<int>::max() / 4;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int MOD = 1e9+7, LOG=25;



void solve();

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int tt=1;
	// cin >> tt;
	while(tt--) solve();
	return 0;
}




int n, k, s, t;
vector<int> h;
vector<vector<int>> adj;
vector<bool> bees, visited;

bool propagate(queue<pair<int, pair<int, int>>> &q, bool bee, int comp) {
	int limit=q.front().se.se;
	while (!q.empty() && q.front().se.se<=limit) {
		int u=q.front().fi, nb=q.front().se.fi, time=q.front().se.se; q.pop();
		if (!bee && bees[u]) continue;
		for (auto v: adj[u]) {
			if (!bee && v==t) return 1;
			if (bees[v] || (!bee && visited[v])) continue;
			if (bee) bees[v]=1;
			else visited[v]=1;
			if (nb+1>=comp) q.push({v, {0, time+1}});
			else q.push({v, {nb+1, time}});
		}
	}
	return 0;
}


bool ok(int wait) {
	bees.clear(), visited.clear(), bees.resize(n, 0), visited.resize(n, 0); visited[s]=1; bees[t]=1;
	for (auto u: h) bees[u]=1;
	queue<pair<int, pair<int, int>>> qbees;
	queue<pair<int, pair<int, int>>> q2; q2.push({s, {0, 0}});
	for (auto u: h) qbees.push({u, {0, 0}});
	if (wait) propagate(qbees, 1, wait);
	while (!q2.empty()) {
		if (propagate(q2, 0, k)) return 1;
		propagate(qbees, 1, 1);
	}
	return 0;
}


void solve() {
	read(n, k);
	vector<string> a(n, string(n, '.')); 
	for (int i=0; i<n; i++) {
		for (int j=0; j<n; j++) cin >> a[i][j];
		char x; cin >> x;
	}
	adj.clear(), adj.resize(n*n);
	for (int i=0; i<n; i++) {
		for (int j=0; j<n; j++) {
			if (a[i][j]=='T') continue;
			int act=i*n+j;
			if (i && a[i-1][j]!='T') {
				int nxt=(i-1)*n+j;
				adj[act].pb(nxt), adj[nxt].pb(act);
			}
			if (j && a[i][j-1]!='T') {
				int nxt=i*n+j-1;
				adj[act].pb(nxt), adj[nxt].pb(act);
			}
			if (a[i][j]=='M') s=act;
			if (a[i][j]=='D') t=act;
			if (a[i][j]=='H') h.pb(act);
		}
	}
	n*=n;
	int ans=-1, l=0, r=n/2;
	while (l<=r) {
		int mid=(l+r)/2;
		if (ok(mid)) ans=mid, l=mid+1;
		else r=mid-1;
	}
	cout << ans << endl;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 0 ms 604 KB Output is correct
4 Correct 0 ms 604 KB Output is correct
5 Correct 0 ms 676 KB Output is correct
6 Correct 0 ms 604 KB Output is correct
7 Correct 745 ms 47452 KB Output is correct
8 Correct 0 ms 604 KB Output is correct
9 Correct 0 ms 604 KB Output is correct
10 Correct 0 ms 604 KB Output is correct
11 Correct 0 ms 604 KB Output is correct
12 Correct 1 ms 860 KB Output is correct
13 Correct 1 ms 860 KB Output is correct
14 Correct 1 ms 860 KB Output is correct
15 Correct 1 ms 604 KB Output is correct
16 Correct 0 ms 604 KB Output is correct
17 Correct 0 ms 604 KB Output is correct
18 Correct 0 ms 856 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 0 ms 604 KB Output is correct
21 Correct 1 ms 856 KB Output is correct
22 Correct 1 ms 600 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 0 ms 604 KB Output is correct
25 Correct 1 ms 724 KB Output is correct
26 Correct 1 ms 860 KB Output is correct
27 Correct 1 ms 860 KB Output is correct
28 Correct 1 ms 860 KB Output is correct
29 Correct 1 ms 860 KB Output is correct
30 Correct 1 ms 860 KB Output is correct
31 Correct 1 ms 860 KB Output is correct
32 Correct 1 ms 860 KB Output is correct
33 Correct 24 ms 5704 KB Output is correct
34 Correct 12 ms 5720 KB Output is correct
35 Correct 34 ms 7516 KB Output is correct
36 Correct 22 ms 7260 KB Output is correct
37 Correct 18 ms 7152 KB Output is correct
38 Correct 36 ms 9820 KB Output is correct
39 Correct 37 ms 9052 KB Output is correct
40 Correct 21 ms 9052 KB Output is correct
41 Correct 63 ms 12124 KB Output is correct
42 Correct 38 ms 10844 KB Output is correct
43 Correct 45 ms 10988 KB Output is correct
44 Correct 72 ms 14944 KB Output is correct
45 Correct 55 ms 13144 KB Output is correct
46 Correct 38 ms 13148 KB Output is correct
47 Correct 83 ms 17756 KB Output is correct
48 Correct 66 ms 15452 KB Output is correct
49 Correct 40 ms 15448 KB Output is correct
50 Correct 119 ms 21080 KB Output is correct
51 Correct 63 ms 18012 KB Output is correct
52 Correct 59 ms 18008 KB Output is correct
53 Correct 104 ms 24656 KB Output is correct
54 Correct 75 ms 20828 KB Output is correct
55 Correct 53 ms 21008 KB Output is correct
56 Correct 129 ms 28508 KB Output is correct
57 Correct 103 ms 23804 KB Output is correct
58 Correct 65 ms 23940 KB Output is correct
59 Correct 233 ms 32708 KB Output is correct
60 Correct 100 ms 26964 KB Output is correct
61 Correct 72 ms 26972 KB Output is correct
62 Correct 286 ms 36944 KB Output is correct
63 Correct 216 ms 30624 KB Output is correct
64 Correct 401 ms 30496 KB Output is correct
65 Correct 265 ms 30544 KB Output is correct
66 Correct 306 ms 30544 KB Output is correct
67 Correct 265 ms 30592 KB Output is correct
68 Correct 309 ms 30548 KB Output is correct
69 Correct 289 ms 30472 KB Output is correct
70 Correct 236 ms 30560 KB Output is correct
71 Correct 328 ms 30492 KB Output is correct
72 Correct 343 ms 30552 KB Output is correct
73 Correct 488 ms 47832 KB Output is correct
74 Correct 502 ms 47664 KB Output is correct
75 Correct 646 ms 47544 KB Output is correct
76 Correct 657 ms 47676 KB Output is correct
77 Correct 573 ms 47640 KB Output is correct
78 Correct 684 ms 47508 KB Output is correct
79 Correct 660 ms 47444 KB Output is correct
80 Correct 683 ms 47572 KB Output is correct
81 Correct 702 ms 47536 KB Output is correct
82 Correct 728 ms 47616 KB Output is correct
83 Correct 790 ms 47400 KB Output is correct
84 Correct 735 ms 47644 KB Output is correct
85 Correct 875 ms 47664 KB Output is correct
86 Correct 783 ms 47560 KB Output is correct
87 Correct 728 ms 47228 KB Output is correct
88 Correct 749 ms 47292 KB Output is correct
89 Correct 727 ms 47128 KB Output is correct
90 Correct 702 ms 47188 KB Output is correct
91 Correct 649 ms 47308 KB Output is correct
92 Correct 819 ms 47344 KB Output is correct