Submission #1045712

#	Time	Username	Problem	Language	Result	Execution time	Memory
1045712		Mher777	Toy (CEOI24_toy)	C++17	0 / 100	5 ms	16476 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];
int n, m, k, l, tx, ty, x1, y1a, x2, y2;
 
void rec1(int i, int yl, int yr) {
    for (int j = yl; j <= yr; ++j) {
        can1[i][j] = 1;
    }
    for (int j = yl; j <= yr; ++j) {
        if (i != 0 && a[i - 1][j] != 'X' && !can1[i - 1][j]) {
            int ind = upper_bound(all(g[i - 1]), j) - g[i - 1].begin();
            int l_up = max(yl, g[i - 1][ind - 1] + 1), r_up =  min(yr, g[i - 1][ind] - 1);
            if (r_up - l_up + 1 < k) continue;
            rec1(i - 1, g[i - 1][ind - 1] + 1, g[i - 1][ind] - 1);
        }
        if (i != n - 1 && a[i + 1][j] != 'X' && !can1[i + 1][j]) {
            int ind = upper_bound(all(g[i + 1]), j) - g[i + 1].begin();
            int l_down = max(yl, g[i + 1][ind - 1] + 1), r_down = min(yr, g[i + 1][ind] - 1);
            if (r_down - l_down + 1 < k) continue;
            rec1(i + 1, g[i + 1][ind - 1] + 1, g[i + 1][ind] - 1);
        }
    }
}
 
void rec2(int j, int xl, int xr) {
    for (int i = xl; i <= xr; ++i) {
        can2[i][j] = 1;
    }
    for (int i = xl; i <= xr; ++i) {
        if (j != 0 && a[i][j - 1] != 'X' && !can2[i][j - 1]) {
            int ind = upper_bound(all(g1[j - 1]), i) - g1[j - 1].begin();
            int l_left = max(xl, g1[j - 1][ind - 1] + 1), r_left = min(xr, g1[j - 1][ind] - 1);
            if (r_left - l_left + 1 < l) continue;
            rec2(j - 1, g1[j - 1][ind - 1] + 1, g1[j - 1][ind] - 1);
        }
        if (j != m - 1 && a[i][j + 1] != 'X' && !can2[i][j + 1]) {
            int ind = upper_bound(all(g1[j + 1]), i) - g1[j + 1].begin();
            int l_right = max(xl, g1[j + 1][ind - 1] + 1), r_right = max(xr, g1[j + 1][ind] - 1);
            if (r_right - l_right + 1 < l) continue;
            rec2(j + 1, g1[j + 1][ind - 1] + 1, g1[j + 1][ind] - 1);
        }
    }
}
 
bool check(int x, int y) {
    if (x < n && x >= 0 && y < m && y >= 0 && can1[x][y] && !used[x][y]) return true;
    return false;
}
 
void dfs(int x, int y) {
    if (x == tx && y == ty) {
        yes;
        exit(0);
    }
    used[x][y] = 1;
    for (int i = 0; i < 4; ++i) {
        if (check(x + dx[i], y + dy[i])) {
            dfs(x + dx[i], y + dy[i]);
        }
    }
}
 
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);
    }
    int ind = upper_bound(all(g[x1]), y1a) - g[x1].begin();
    rec1(x1, g[x1][ind - 1] + 1, g[x1][ind] - 1);
    ind = upper_bound(all(g1[y2]), x2) - g1[y2].begin();
    rec2(y2, g1[y2][ind - 1] + 1, g1[y2][ind] - 1);
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            can1[i][j] &= can2[i][j];
        }
    }
    int hat_x = x1, hat_y = y2;
    dfs(hat_x, hat_y);
    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