Submission #569885

#	Time	Username	Problem	Language	Result	Execution time	Memory
569885		KoD	Koala Game (APIO17_koala)	C++17	Compilation error	0 ms	0 KiB

koala

#include "koala.h"
#include <bits/stdc++.h>

int minValue(int N, int W) {
    int B[100] = {}, R[100] = {};
    B[0] = 1;
    playRound(B, R);
    for (int i = 1; i < N; ++i) {
        if (R[i] == 0) {
            return i;
        }
    }
    return 0;
}

int maxValue(int N, int W) {
    int B[100] = {}, R[100] = {};
    std::vector<int> cand(N);
    std::iota(cand.begin(), cand.end(), 0);
    while (cand.size() > 1) {
        const int x = W / (int)cand.size();
        for (const int i : cand) {
            B[i] = x;
        }
        playRound(B, R);
        std::vector<int> next;
        for (const int i : cand) {
            if (B[i] < R[i]) {
                next.push_back(i);
            }
            B[i] = 0;
        }
        cand = std::move(next);
    }
    return cand[0];
}

int greaterValue(int N, int W) {
    int B[100] = {}, R[100] = {};
    const auto put_and_play = [&](const int x) {
        B[0] = B[1] = x;
        playRound(B, R);
        return (B[0] < R[0]) + (B[1] < R[1]);
    };
    const int a = put_and_play(4);
    if (a == 2) {
        put_and_play(8);
    } else if (a == 0) {
        const int b = put_and_play(2);
        if (b == 0) {
            put_and_play(1);
        }
    }
    return B[1] < R[1];
}

template <class F>
struct fixed_point : private F {
    explicit fixed_point(F&& f) : F(std::forward<F>(f)) {}
    template <class... Args>
    decltype(auto) operator()(Args&&... args) const {
        return F::operator()(*this, std::forward<Args>(args)...);
    }
};

void allValues(int N, int W, int* P) {
    int B[100] = {}, R[100] = {};
    if (W == 2 * N) {
        std::vector<int> ord(N);
        std::iota(ord.begin(), ord.end(), 0);
        fixed_point([&](auto&& dfs, const int l, const int r) -> void {
            if (r - l == 1) {
                return;
            }
            const int m = (l + r) / 2;
            dfs(l, m);
            dfs(m, r);
            std::inplace_merge(ord.begin() + l, ord.begin() + m, ord.begin() + r,
                               [&](const int i, const int j) {
                                   B[i] = B[j] = N;
                                   playRound(B, R);
                                   const bool ret = B[j] < R[j];
                                   B[i] = B[j] = 0;
                                   return ret;
                               });
        })(0, N);
        for (int i = 0; i < N; ++i) {
            P[ord[i]] = i + 1;
        }
    } else {
        std::vector<int> v(N);
        std::iota(v.begin(), v.end(), 0);
        fixed_point([&](auto&& dfs, const int l, std::vector<int> v) -> void {
            if (v.size() == 1) {
                P[v[0]] = l;
            } else {
                std::fill(B, B + N, 0);
                const int w = std::min<int>(W / v.size(), std::sqrt(2 * l));
                for (const int i : v) {
                    B[i] = w;
                }
                playRound(B, R);
                vector<int> a, b;
                for (const int i : v) {
                    (R[i] <= w ? a : b).push_back(i);
                }
                const int r = l + a.size();
                dfs(l, std::move(a));
                dfs(r, std::move(b));
            }
        })(1, std::move(v));
    }
}

Compilation message (stderr)

koala.cpp: In lambda function:
koala.cpp:103:17: error: 'vector' was not declared in this scope
  103 |                 vector<int> a, b;
      |                 ^~~~~~
koala.cpp:103:17: note: suggested alternatives:
In file included from /usr/include/c++/10/vector:67,
                 from /usr/include/c++/10/functional:62,
                 from /usr/include/c++/10/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from koala.cpp:2:
/usr/include/c++/10/bits/stl_vector.h:389:11: note:   'std::vector'
  389 |     class vector : protected _Vector_base<_Tp, _Alloc>
      |           ^~~~~~
In file included from /usr/include/c++/10/functional:62,
                 from /usr/include/c++/10/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/10/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:65,
                 from koala.cpp:2:
/usr/include/c++/10/vector:86:13: note:   'std::pmr::vector'
   86 |       using vector = std::vector<_Tp, polymorphic_allocator<_Tp>>;
      |             ^~~~~~
koala.cpp:103:24: error: expected primary-expression before 'int'
  103 |                 vector<int> a, b;
      |                        ^~~
koala.cpp:105:34: error: 'a' was not declared in this scope
  105 |                     (R[i] <= w ? a : b).push_back(i);
      |                                  ^
koala.cpp:105:38: error: 'b' was not declared in this scope
  105 |                     (R[i] <= w ? a : b).push_back(i);
      |                                      ^
koala.cpp:107:35: error: 'a' was not declared in this scope
  107 |                 const int r = l + a.size();
      |                                   ^
koala.cpp:109:34: error: 'b' was not declared in this scope
  109 |                 dfs(r, std::move(b));
      |                                  ^