#961406 (C++17(gcc12)) No.2673 A present from B

• 問題: No.2673 A present from B
• ユーザー: eoeo
• 提出日時: 2024-03-17 00:44:37
• 言語: C++17(gcc12) (gcc 12.3.0 + boost 1.87.0)
• 結果: WA (最新)
  CE
  (最初)
• 実行時間: -
• コード長: 7,633 bytes
• コンパイル時間: 6,912 ms
• コンパイル使用メモリ: 261,768 KB
• 最終ジャッジ日時: 2025-02-20 06:59:12
• ジャッジサーバーID （参考情報）: judge2 / judge5

ファイルパターン	結果
sample	AC * 3
other	AC * 19 WA * 5

コンパイルメッセージ

main.cpp: In function 'void solve(int)':
main.cpp:39:12: warning: ignoring return value of 'constexpr std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](size_type) [with _Tp = long long int; _Alloc = std::allocator<long long int>; reference = long long int&; size_type = long unsigned int]', declared with attribute 'nodiscard' [-Wunused-result]
   39 |         a[i];
      |            ^
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/vector:64,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/functional:62,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/x86_64-pc-linux-gnu/bits/stdc++.h:71,
                 from main.cpp:1:
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/stl_vector.h:1123:7: note: declared here
 1123 |       operator[](size_type __n) _GLIBCXX_NOEXCEPT
      |       ^~~~~~~~

ソースコード

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#ifdef MY_DEBUG
#define dbg(var) debug_out(#var, "=", var)
#define dbgm(...) debug_out(__VA_ARGS__)
#else
#define dbg(...)
#define dbgm(...)
#endif
void debug_out();
template <class Head, class... Tail>
void debug_out(Head, Tail...);
template <class T>
bool chmax(T &, const T &);
template <class T>
bool chmin(T &, const T &);
template <class T>
T pwr(T, ll);
template <class T>
T squ(T x) { return x * x; }
ll fact(ll);
ll comb(ll, ll);
ll ctoll(char);
char lltoc(ll);
bool flg(ll b, ll i) { return ((b) >> (i)) & 1LL; } // flg(0b010, 1LL) -> true
const ll LINF = (ll)4e18 + 7;
const double EPS = 1e-9;
const int MAX_DUBUG_SIZE = 10;

void solve([[maybe_unused]] int test)
{
    ll n, m;
    cin >> n >> m;
    vector<ll> a(m);
    for (ll i = 0; i < m; i++)
    {
        cin >> a[i];
        a[i];
    }

    vector<ll> dist(n + 2);
    for (ll i = 0; i < n + 2; i++)
    {
        dist[i] = i - 1;
    }

    for (ll i = m - 1; i >= 0; i--)
    {
        dbg(dist);
        ll x = a[i];
        if (dist[x] == dist[x + 1])
            continue;
        else if (dist[x] < dist[x + 1])
        {
            swap(dist[x], dist[x + 1]);
            if (dist[x - 1] < dist[x])
                dist[x] = dist[x - 1] + 1;
            for (ll j = x + 2; j <= n and (dist[j] > dist[j - 1] + 1); j++)
            {
                dist[j]--;
            }
        }
        else
        {
            swap(dist[x], dist[x + 1]);
            if (dist[x + 2] < dist[x + 1])
                dist[x + 1] = dist[x + 2] + 1;
            for (ll j = x - 1; j <= n and (dist[j] > dist[j + 1] + 1); j--)
            {
                dist[j]--;
            }
        }
    }
    dbg(dist);

    for (ll i = 2; i < ssize(dist) - 1; i++)
    {
        cout << dist[i] << (i == ssize(dist) - 2 ? "\n" : " ");
    }
}

int main()
{
    cin.tie(nullptr), ios::sync_with_stdio(false);
    cout << fixed << setprecision(12), cerr << fixed << setprecision(12);

    int testcase_size = 1;
    // cin >> testcase_size;

    for (int _t = 0; _t < testcase_size; _t++)
    {
        solve(_t);
    }
}

/*



























-----------------------------------MY_FUNCTIONS------------------------------------ */

template <class First, class Second>
ostream &operator<<(ostream &os, const pair<First, Second> &pp);
template <class T>
ostream &operator<<(ostream &os, const vector<T> &V);
template <class T>
ostream &operator<<(ostream &os, const vector<vector<T>> &VV);
template <class T>
ostream &operator<<(ostream &os, const vector<vector<vector<T>>> &VVV);
template <class T>
ostream &operator<<(ostream &os, const set<T> &SS);
template <class Key, class Tp>
ostream &operator<<(ostream &os, const map<Key, Tp> &MM);
void debug_out();
void debug_out_vl(vector<ll> V);
void debug_out_vvl(vector<vector<ll>> VV);
template <class Head, class... Tail>
void debug_out(Head H, Tail... T);

template <class First, class Second>
ostream &operator<<(ostream &os, const pair<First, Second> &pp)
{
    return os << "{" << pp.first << "," << pp.second << "}";
}

template <class T>
ostream &operator<<(ostream &os, const vector<T> &V)
{
    if (V.empty())
        return os << "[]";
    os << "[";
    for (ll i = 0; i < (ll)V.size(); i++)
    {
        os << V[i] << (i == int(V.size() - 1) ? "]" : ",");
    }
    return os;
}

template <class T>
ostream &operator<<(ostream &os, const vector<vector<T>> &VV)
{
    if (VV.empty())
        return os << "[[]]";
    os << "[" << endl;
    for (auto &&V : VV)
    {
        os << V << endl;
    }
    os << "]";
    return os;
}

template <class T>
ostream &operator<<(ostream &os, const vector<vector<vector<T>>> &VVV)
{
    if (VVV.empty())
        return os << "[[[]]]";
    os << "[" << endl;
    int cnt = 0;
    for (auto &&VV : VVV)
    {
        os << cnt++ << VV << endl
           << endl;
    }
    os << "]";
    return os;
}

template <class T>
ostream &operator<<(ostream &os, const set<T> &SS)
{
    if (SS.empty())
        return os << "[]";
    os << "[";
    auto ii = SS.begin();
    for (; ii != SS.end(); ii++)
        os << *ii << (ii == prev(SS.end()) ? "]" : ",");
    return os;
}

template <class Key, class Tp>
ostream &operator<<(ostream &os, const map<Key, Tp> &MM)
{
    if (MM.empty())
        return os << "[{:}]";
    os << "[";
    auto ii = MM.begin();
    for (; ii != MM.end(); ii++)
        os << "{" << ii->first << ":" << ii->second << "}" << (ii == prev(MM.end()) ? "]" : ",");
    return os;
}

void debug_out() { cerr << endl; }

void debug_out_vl(vector<ll> V)
{
    const int MAX_SIZE = min((int)V.size(), MAX_DUBUG_SIZE);

    cerr << "\033[33m";
    if (V.empty())
    {
        cerr << "[]" << endl;
        return;
    }
    cerr << "[";
    for (int i = 0; i < MAX_SIZE; i++)
    {
        if (V[i] == LINF)
            cerr << "INF";
        else
            cerr << V[i];

        if (i == (int)V.size() - 1)
            cerr << "]" << endl;
        else if (i == MAX_DUBUG_SIZE - 1)
            cerr << ",..." << endl;
        else
            cerr << ",";
    }
    return;
}

void debug_out_vvl(vector<vector<ll>> VV)
{
    cerr << "\033[33m";
    if (VV.empty())
    {
        cerr << "[[]]" << endl;
        return;
    }
    cerr << "[" << endl;

    int MAX_ROW = min((int)VV.size(), MAX_DUBUG_SIZE);
    for (int i = 0; i < MAX_ROW; i++)
    {
        const int MAX_COLUMN = min((int)VV[i].size(), MAX_DUBUG_SIZE);
        if (VV[i].empty())
        {
            cerr << "[]" << endl;
            continue;
        }
        cerr << "[";
        for (int j = 0; j < MAX_COLUMN; j++)
        {
            if (VV[i][j] == LINF)
                cerr << "INF";
            else
                cerr << VV[i][j];

            if (j == (int)VV[i].size() - 1)
                cerr << "]" << endl;
            else if (j == MAX_DUBUG_SIZE - 1)
                cerr << ",..." << endl;
            else
                cerr << ",";
        }

        if (i != (int)VV.size() - 1 and i == MAX_DUBUG_SIZE - 1)
        {
            cerr << ":\n:\033[m" << endl;
            return;
        }
    }

    cerr << "]\033[m" << endl;
    return;
}

template <class Head, class... Tail>
void debug_out(Head H, Tail... T)
{
    if constexpr (std::is_same_v<Head, vector<ll>>)
    {
        debug_out_vl(H);
    }
    else if constexpr (std::is_same_v<Head, vector<vector<ll>>>)
    {
        debug_out_vvl(H);
    }
    else
    {
        cerr << "\033[33m" << H << "\033[m ";
    }

    debug_out(T...);
}

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

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

template <class T>
T pwr(T x, ll n)
{
    T res = 1;
    for (int i = 0; i < n; i++)
    {
        res *= x;
    }
    return res;
}

ll fact(ll n)
{
    ll res = 1;
    for (ll i = 1; i <= n; i++)
        res *= i;
    return res;
}

ll comb(ll n, ll r)
{ // comb(60, 30)までオーバーフローなし
    ll res = 1;
    for (int i = 1; i <= r; i++)
    {
        res *= n--;
        res /= i;
    }
    return res;
}

ll ctoll(char c)
{
    if (c < '0' or '9' < c)
    {
        cerr << "\n\033[33m ctoll に '0'~'9' 以外の文字が入りました．\033[m\n"
             << endl;
    }
    return ll(c - '0');
}

char lltoc(ll n)
{
    if (n < 0 or 9 < n)
    {
        cerr << "\n\033[33m lltoc に 0 ~ 9 以外の数字が入りました．\033[m\n"
             << endl;
    }
    return char(n + '0');
}