제출 #257304

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
257304		KoD	무지개나라 (APIO17_rainbow)	C++17	0 / 100	1 ms	512 KiB

rainbow

#line 1 "main.cpp"

/**
 * @title Template
 */

#line 1 "rainbow.h"

#ifdef LOCAL
#ifndef __RAINBOW_H
#define __RAINBOW_H

#include <cstdint>

void init(int32_t R, int32_t C, int32_t sr, int32_t sc, int32_t M, char * S);
int32_t colour(int32_t ar, int32_t ac, int32_t br, int32_t bc);

#endif  // __RAINBOW_H
#endif
#line 7 "main.cpp"
#include <iostream>
#include <algorithm>
#include <utility>
#include <numeric>
#include <vector>
#include <array>
#include <cassert>

#line 2 "/Users/kodamankod/Desktop/Programming/Library/other/chmin_chmax.cpp"

template <class T, class U>
constexpr bool chmin(T &lhs, const U &rhs) {
  if (lhs > rhs) { 
    lhs = rhs; 
    return true; 
  }
  return false;
}

template <class T, class U>
constexpr bool chmax(T &lhs, const U &rhs) {
  if (lhs < rhs) { 
    lhs = rhs; 
    return true; 
  }
  return false;
}

/**
 * @title Chmin/Chmax
 */
#line 2 "/Users/kodamankod/Desktop/Programming/Library/other/range.cpp"

#line 4 "/Users/kodamankod/Desktop/Programming/Library/other/range.cpp"

class range {
public:
  class iterator {
  private:
    int64_t M_position;

  public:
    constexpr iterator(int64_t position) noexcept: M_position(position) { }
    constexpr void operator ++ () noexcept { ++M_position; }
    constexpr bool operator != (iterator other) const noexcept { return M_position != other.M_position; }
    constexpr int64_t operator * () const noexcept { return M_position; }

  };

  class reverse_iterator {
  private:
    int64_t M_position;
  
  public:
    constexpr reverse_iterator(int64_t position) noexcept: M_position(position) { }
    constexpr void operator ++ () noexcept { --M_position; }
    constexpr bool operator != (reverse_iterator other) const noexcept { return M_position != other.M_position; }
    constexpr int64_t operator * () const noexcept { return M_position; }

  };
  
private:
  const iterator M_first, M_last;

public:
  constexpr range(int64_t first, int64_t last) noexcept: M_first(first), M_last(std::max(first, last)) { }
  constexpr iterator begin() const noexcept { return M_first; }
  constexpr iterator end() const noexcept { return M_last; }
  constexpr reverse_iterator rbegin() const noexcept { return reverse_iterator(*M_last - 1); } 
  constexpr reverse_iterator rend() const noexcept { return reverse_iterator(*M_first - 1); } 

};

/**
 * @title Range
 */
#line 2 "/Users/kodamankod/Desktop/Programming/Library/other/rev.cpp"

#include <type_traits>
#include <iterator>
#line 6 "/Users/kodamankod/Desktop/Programming/Library/other/rev.cpp"

template <class T>
class rev_impl {
public:
  using iterator = typename std::decay<T>::type::reverse_iterator;

private:
  const iterator M_begin;
  const iterator M_end;

public:
  constexpr rev_impl(T &&cont) noexcept: M_begin(std::rbegin(cont)), M_end(std::rend(cont)) { }
  constexpr iterator begin() const noexcept { return M_begin; }
  constexpr iterator end() const noexcept { return M_end; }

};

template <class T>
constexpr decltype(auto) rev(T &&cont) {
  return rev_impl<T>(std::forward<T>(cont));
}

/**
 * @title Reverser
 */
#line 2 "/Users/kodamankod/Desktop/Programming/Library/other/fix_point.cpp"

#line 4 "/Users/kodamankod/Desktop/Programming/Library/other/fix_point.cpp"

template <class Func>
struct fix_point_impl: private Func {
  explicit constexpr fix_point_impl(Func &&func): Func(std::forward<Func>(func)) { }
  template <class... Args>
  constexpr decltype(auto) operator () (Args &&... args) const {
    return Func::operator()(*this, std::forward<Args>(args)...);
  }
};

template <class Func>
constexpr decltype(auto) fix_point(Func &&func) {
  return fix_point_impl<Func>(std::forward<Func>(func));
}

/**
 * @title Lambda Recursion
 */
#line 19 "main.cpp"

using i32 = int32_t;
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;

constexpr i32 inf32 = (i32(1) << 30) - 1;
constexpr i64 inf64 = (i64(1) << 62) - 1;

constexpr i32 dx[] = { 0, 1, 0, -1 };
constexpr i32 dy[] = { 1, 0, -1, 0 };

i32 H, W;
std::vector<std::vector<bool>> river;
std::array<std::vector<i32>, 3> sum;

void init(i32 R, i32 C, i32 sr, i32 sc, i32 M, char * S) {
  H = R, W = C;
  river = std::vector<std::vector<bool>>(H, std::vector<bool>(W));
  // assert(R <= 50 && C <= 50);
  assert(R == 2);
  {
    i32 x = sr - 1, y = sc - 1;
    river[x][y] = true;
    for (auto i: range(0, M)) {
      char c = S[i];
      if (c == 'N') --x;
      if (c == 'E') ++y;
      if (c == 'W') --y;
      if (c == 'S') ++x;
      river[x][y] = true;
    }
  }
  sum.fill(std::vector<i32>(W));
  for (auto i: range(0, 2)) {
    for (auto j: range(0, W)) {
      if (j > 0) {
        sum[i][j] += sum[i][j - 1] + (river[i][j] != river[i][j - 1]);
      }
    }
  }
  for (auto j: range(0, W)) {
    if (j > 0) {
      sum[2][j] += sum[2][j - 1] + ((river[0][j] && river[1][j]) != (river[0][j - 1] && river[1][j - 1]));
    }
  }
}

i32 colour(i32 ar, i32 ac, i32 br, i32 bc) {
  --ar; --ac;
  if (br - ar == 1) {
    i32 tmp = sum[ar][bc - 1] - sum[ar][ac];
    tmp += (!river[ar][ac]) + (!river[ar][bc - 1]);
    tmp /= 2;
    return tmp;
  }
  else {
    i32 tmp = sum[2][bc - 1] - sum[2][ac];
    tmp += (!(river[0][ac] || river[1][ac])) + (!(river[0][bc - 1] || river[1][bc - 1]));
    tmp /= 2;
    return tmp;
  }
}

#ifdef LOCAL

#include <stdio.h>

static int R, C, M, Q;
static int sr, sc;
static char S[100000 + 5];

int main() {
    scanf("%d %d %d %d", &R, &C, &M, &Q);
    scanf("%d %d", &sr, &sc);
    if (M > 0) {
        scanf(" %s ", S);
    }

    init(R, C, sr, sc, M, S);

    int query;
    for (query = 0; query < Q; query++) {
        int ar, ac, br, bc;
        scanf("%d %d %d %d", &ar, &ac, &br, &bc);
        printf("%d\n", colour(ar, ac, br, bc));
    }

    return 0;
}

#endif

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