oj.uz

답안 #264472

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
264472 2020-08-14T07:08:00 Z KoD 코알라 (APIO17_koala) C++11
37 / 100
 118 ms 1268 KB 
/**
 * @title Template
 */

#include <iostream>
#include <algorithm>
#include <utility>
#include <numeric>
#include <vector>
#include <array>
#include <cassert>


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

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

/**
 * @title Chmin/Chmax
 */


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

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

  };

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

  };
  
private:
  const iterator M_first, M_last;

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

};

/**
 * @title Range
 */

#include <type_traits>
#include <iterator>

template <class T>
class rev_impl {
public:
  using iterator = decltype(std::declval<T>().rbegin());

private:
  const iterator M_begin;
  const iterator M_end;

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

};

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

/**
 * @title Reverser
 */

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;

void playRound(i32 *B, i32 *R);
i32 minValue(const i32 N, const i32 W);
i32 maxValue(const i32 N, const i32 W);
i32 greaterValue(const i32 N, const i32 W);
void allValues(const i32 N, const i32 W, i32 *P);

 
i32 minValue(const i32 N, const i32 W) {
  // TODO: Implement Subtask 1 solution here.
  // You may leave this function unmodified if you are not attempting this
  // subtask.
  i32* const B = new i32[N];
  B[0] = 1;
  std::fill(B + 1, B + N, 0);
  i32* const R = new i32[N];
  playRound(B, R);
  for (auto i: range(0, N)) {
    if (R[i] == 0) {
      return i;
    }
  }
  return 0;
}
 
i32 maxValue(const i32 N, const i32 W) {
  // TODO: Implement Subtask 2 solution here.
  // You may leave this function unmodified if you are not attempting this
  // subtask.
  i32* const B = new i32[N];
  i32* const R = new i32[N];
  bool* const cand = new bool[N];
  std::fill(cand, cand + N, true);
  i32 size = N;
  while (size > 1) {
    for (auto i: range(0, N)) {
      B[i] = cand[i] ? (W / size) : 0;
    }
    playRound(B, R);
    size = 0;
    for (auto i: range(0, N)) {
      cand[i] = (cand[i] && R[i] > B[i]);
      if (cand[i]) {
        ++size;
      }
    }
  }
  for (auto i: range(0, N)) {
    if (cand[i]) {
      return i;
    }
  }
  return 0;
}
 
i32 greaterValue(const i32 N, const i32 W) {
  // TODO: Implement Subtask 3 solution here.
  // You may leave this function unmodified if you are not attempting this
  // subtask.
  i32* const B = new i32[N];
  i32* const R = new i32[N];
  std::fill(B, B + N, 0);
  auto ask = [&](const i32 num) {
    B[0] = B[1] = num;
    playRound(B, R);
    bool f0 = R[0] > B[0];
    bool f1 = R[1] > B[1];
    B[0] = B[1] = 0;
    if (f0 && !f1) return 0;
    if (!f0 && f1) return 1;
    if (!f0 && !f1) return 2;
    if (f0 && f1) return 3;
    return -1;
  };
  const i32 a = ask(3);
  if (a == 2) {
    const i32 b = ask(2);
    if (b == 2) {
      return ask(1);
    }
    return b;
  }
  else if (a == 3) {
    const i32 b = ask(5);
    if (b == 3) {
      return ask(9);
    }
    return b;
  }
  return a;
}
 
void allValues(const i32 N, const i32 W, i32* const P) {
  if (W == 2 * N) {
    // TODO: Implement Subtask 4 solution here.
    // You may leave this block unmodified if you are not attempting this
    // subtask.
  } else {
    // TODO: Implement Subtask 5 solution here.
    // You may leave this block unmodified if you are not attempting this
    // subtask.
  }
}

#ifdef LOCAL
 
#include <stdio.h>
#include <stdlib.h>
 
static int N, W;
static int P[105];
 
static int maxQueries = 3200;
static int numQueries;
 
static void runGame(int F);
static void grader();
 
int main() {
    grader();
    return 0;
}
 
void playRound(int *B, int *R) {
    int i, j;
 
    int S = 0;
    for (i=0;i<N;++i) {
        if ( !(B[i] >= 0 && B[i] <= W) ) {
            printf("Invalid query1.\n");
            exit(0);
        }
        S += B[i];
    }
    if (S > W) {
        printf("Invalid query2.\n");
        exit(0);
    }
 
    numQueries++;
    if (numQueries > maxQueries) {
        printf("Too many queries.\n");
        exit(0);
    }
 
    int cache[2][205];
    int num[2][205];
    char taken[105][205];
 
    for (i=0;i<205;++i) {
        cache[1][i] = 0;
        num[1][i] = 0;
    }
 
    for (i=0;i<N;++i) {
        int v = B[i]+1;
        int ii = i&1;
        int o = ii^1;
        for (j=0;j<=W;++j) {
            cache[ii][j] = cache[o][j];
            num[ii][j] = num[o][j];
            taken[i][j] = 0;
        }
        for (j=W;j>=v;--j) {
            int h = cache[o][j-v] + P[i];
            int hn = num[o][j-v] + 1;
            if (h > cache[ii][j] || (h == cache[ii][j] && hn > num[ii][j])) {
                cache[ii][j] = h;
                num[ii][j] = hn;
                taken[i][j] = 1;
            } else {
                taken[i][j] = 0;
            }
        }
    }
 
    int cur = W;
    for (i=N-1;i>=0;--i) {
        R[i] = taken[i][cur] ? (B[i] + 1) : 0;
        cur -= R[i];
    }
}
 
static void runGame(int F) {
    int i;
 
    scanf("%d %d",&N,&W);
    for (i=0;i<N;++i) {
        scanf("%d",&P[i]);
    }
 
    numQueries = 0;
    if (F == 1) {
        printf("%d\n", minValue(N, W));
    } else if (F == 2) {
        printf("%d\n", maxValue(N, W));
    } else if (F == 3) {
        printf("%d\n", greaterValue(N, W));
    } else if (F == 4) {
        int userP[105];
        allValues(N, W, userP);
        for (i=0;i<N;i++) {
            printf("%d ",userP[i]);
        }
        printf("\n");
    }
    printf("Made %d calls to playRound.\n", numQueries);
}
 
static void grader() {
    int i;
 
    int F, G;
    scanf("%d %d",&F,&G);
 
    for (i=0;i<G;i++) {
        runGame(F);
    }
}

#endif

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 384 KB Output is correct
2 Correct 7 ms 384 KB Output is correct
3 Correct 6 ms 384 KB Output is correct
4 Correct 6 ms 384 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 384 KB Output is correct
2 Correct 20 ms 504 KB Output is correct
3 Correct 20 ms 384 KB Output is correct
4 Correct 20 ms 384 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 114 ms 1240 KB Output is correct
2 Correct 117 ms 1116 KB Output is correct
3 Correct 111 ms 1240 KB Output is correct
4 Correct 114 ms 1240 KB Output is correct
5 Correct 111 ms 1240 KB Output is correct
6 Correct 112 ms 1268 KB Output is correct
7 Correct 118 ms 1240 KB Output is correct
8 Correct 113 ms 1240 KB Output is correct
9 Correct 110 ms 1240 KB Output is correct
10 Correct 110 ms 1240 KB Output is correct

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 256 KB Output isn't correct
2 Halted 0 ms 0 KB -