Submission #1045831

#	Time	Username	Problem	Language	Result	Execution time	Memory
1045831		Mher777	Toy (CEOI24_toy)	C++17	0 / 100	7 ms	12636 KiB

Main

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <array>
#include <string>
#include <algorithm>
#include <cmath>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <bitset>
#include <list>
#include <iterator>
#include <numeric>
#include <complex>
#include <utility>
#include <random>
#include <cassert>
#include <fstream>
using namespace std;
mt19937_64 rnd(7069);

/* -------------------- Typedefs -------------------- */

typedef int itn;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef float fl;
typedef long double ld;

/* -------------------- Usings -------------------- */

using vi = vector<int>;
using vll = vector<ll>;
using mii = map<int, int>;
using mll = map<ll, ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

/* -------------------- Defines -------------------- */

#define ff first
#define ss second
#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define mpr make_pair
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define all(x) (x).begin(), (x).end()
#define USACO freopen("feast.in", "r", stdin); freopen("feast.out", "w", stdout);

/* -------------------- Constants -------------------- */

const int dx[8] = { -1, 0, 1, 0, -1, -1, 1, 1 };
const int dy[8] = { 0, -1, 0, 1, -1, 1, -1, 1 };
const int MAX = int(1e9 + 5);
const ll MAXL = ll(1e18) + 5ll;
const ll MOD = ll(1000000007);
const ll MOD2 = ll(998244353);

/* -------------------- Functions -------------------- */

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
}

void precision(int x) {
    cout.setf(ios::fixed | ios::showpoint);
    cout.precision(x);
}

ll gcd(ll a, ll b) {
    if (a == 0 || b == 0) return(max(a, b));
    while (b) {
        a %= b;
        swap(a, b);
    }
    return a;
}

ll lcm(ll a, ll b) {
    return a / gcd(a, b) * b;
}

ll range_sum(ll a, ll b) {
    if (a > b) return 0ll;
    ll dif = a - 1, cnt = b - a + 1;
    ll ans = ((b - a + 1) * (b - a + 2)) / 2;
    ans += ((b - a + 1) * dif);
    return ans;
}

string dec_to_bin(ll a) {
    string s = "";
    for (ll i = a; i > 0; ) {
        ll k = i % 2;
        i /= 2;
        char c = k + 48;
        s += c;
    }
    if (a == 0) {
        s = "0";
    }
    reverse(all(s));
    return s;
}

ll bin_to_dec(string s) {
    ll num = 0;
    for (int i = 0; i < s.size(); i++) {
        num *= 2ll;
        num += (s[i] - '0');
    }
    return num;
}

ll factorial_by_mod(ll n, ll mod) {
    ll ans = 1;
    ll num;
    for (ll i = 1; i <= n; ++i) {
        num = i % mod;
        ans *= num;
        ans %= mod;
    }
    return ans;
}

bool isPrime(ll a) {
    if (a == 1) return false;
    for (ll i = 2; i * i <= a; i++) {
        if (a % i == 0) return false;
    }
    return true;
}

ll binpow(ll a, ll b) {
    if (!a) return 0;
    ll ans = 1;
    while (b) {
        if (b & 1) {
            ans *= a;
        }
        b >>= 1;
        a *= a;
    }
    return ans;
}

ll binpow_by_mod(ll a, ll b, ll mod) {
    if (!a) return 0;
    ll ans = 1;
    while (b) {
        if (b & 1) {
            ans *= a;
            ans %= mod;
        }
        b >>= 1;
        a *= a;
        a %= mod;
    }
    return ans;
}

/* -------------------- Solution -------------------- */

const int N = 1505;
int can1[N][N], can2[N][N], used[N][N];
char a[N][N];
vi g[N], g1[N], col[N];
int n, m, k, l, tx, ty, x1, y1a, x2, y2;

void dfs1(int x, int y) {
    used[x][y] = can1[x][y] = 1;
    // up
    if (x > 0 && !used[x - 1][y]) {
        int ind = lower_bound(all(g[x - 1]), y) - g[x - 1].begin();
        if (g[x - 1][ind] - 1 >= y + k - 1) dfs1(x - 1, y);
    }
    //down
    if (x < n - 1 && !used[x + 1][y]) {
        int ind = lower_bound(all(g[x + 1]), y) - g[x + 1].begin();
        if (g[x + 1][ind] - 1 >= y + k - 1) dfs1(x + 1, y);
    }
    //left
    if (y > 0 && !used[x][y - 1] && a[x][y - 1] != 'X') {
        dfs1(x, y - 1);
    }
    //right
    if (y + k < m && !used[x][y + 1] && a[x][y + k] != 'X') {
        dfs1(x, y + 1);
    }
}

void dfs(int x, int y) {
    used[x][y] = 1;
    if (y == ty && tx >= x && tx <= x + l - 1) {
        yes;
        exit(0);
    }
    //up
    if (x > 0 && !used[x - 1][y]) {
        int ind = lower_bound(all(col[y]), x - 1) - col[y].begin();
        if (col[y][ind] > x + l - 2) {
            dfs(x - 1, y);
        }
    }
    //down
    if (x + l < n && !used[x + 1][y]) {
        int ind = lower_bound(all(col[y]), x + 1) - col[y].begin();
        if (col[y][ind] > x + l) {
            dfs(x + 1, y);
        }
    }
    //left
    if (y > 0 && !used[x][y - 1]) {
        int ind = lower_bound(all(col[y - 1]), x) - col[y - 1].begin();
        if (col[y - 1][ind] > x + l - 1) {
            dfs(x, y - 1);
        }
    }
    //right
    if (y < m - 1 && !used[x][y + 1]) {
        int ind = lower_bound(all(col[y + 1]), x) - col[y + 1].begin();
        if (col[y + 1][ind] > x + l - 1) {
            dfs(x, y + 1);
        }
    }
}

void slv() {
    cin >> n >> m >> k >> l >> x1 >> y1a >> x2 >> y2;
    swap(x1, y1a);
    swap(x2, y2);
    swap(n, m);
    for (int i = 0; i < n; ++i) {
        g[i].pub(-1);
        for (int j = 0; j < m; ++j) {
            cin >> a[i][j];
            if (a[i][j] == 'X') {
                g[i].pub(j);
            }
            if (a[i][j] == '*') {
                tx = i, ty = j;
            }
        }
        g[i].pub(m);
    }
    for (int j = 0; j < m; ++j) {
        g1[j].pub(-1);
        for (int i = 0; i < n; ++i) {
            if (a[i][j] == 'X') {
                g1[j].pub(i);
            }
        }
        g1[j].pub(n);
    }
    dfs1(x1, y1a);
    for (int i = 0; i < n; ++i) {
        int till = -1;
        for (int j = 0; j < m; ++j) {
            used[i][j] = 0;
            if (can1[i][j]) till = j + k - 1;
            if (j <= till) can1[i][j] = 1;
        }
    }
    if (!can1[tx][ty]) {
        no;
        return;
    }
    for (int j = 0; j < m; ++j) {
        col[j].pub(-1);
        for (int i = 0; i < n; ++i) {
            if (!can1[i][j]) {
                col[j].pub(i);
            }
        }
        col[j].pub(n);
    }
    dfs(x2, y2);
    no;
}

void cs() {
    int tstc = 1;
    //cin >> tstc;
    while (tstc--) {
        slv();
    }
}

void precalc() {
    return;
}

int main() {
    fastio();
    precalc();
    //precision(0);
    cs();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'll range_sum(ll, ll)':
Main.cpp:97:21: warning: unused variable 'cnt' [-Wunused-variable]
   97 |     ll dif = a - 1, cnt = b - a + 1;
      |                     ^~~
Main.cpp: In function 'll bin_to_dec(std::string)':
Main.cpp:120:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  120 |     for (int i = 0; i < s.size(); i++) {
      |                     ~~^~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 0 / 14
• Subtask 2: 0 / 21
• Subtask 3: 0 / 9
• Subtask 4: 0 / 29
• Subtask 5: 0 / 27