Submission #229521

#	Time	Username	Problem	Language	Result	Execution time	Memory
229521		534351	Wine Tasting (FXCUP4_wine)	C++17	100 / 100	12 ms	940 KiB

bartender

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

using namespace std;

#define PB push_back
#define fi first
#define se second
#define SZ(x) ((int) (x).size())
#define ALL(x) (x).begin(), (x).end()
#define FOR(i, a, b) for (auto i = (a); i < (b); i++)

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

static int N, L;
static vi ord;
static int fen[33];

static void update(int idx, int v)
{
    for (int e = idx + 1; e <= N; e += e & (-e)) fen[e] += v;
}
static int qry(int idx)
{
    int res = 0;
    for (int e = idx + 1; e; e -= e & (-e)) res += fen[e];
    return res;
}

static ll encode(vi v) //counts the # of permutations coming before v.
{
    ll w = 1;
    FOR(i, 1, SZ(v) + 1) w *= i;
    ll res = 0;
    FOR(i, 0, SZ(v))
    {
        update(v[i], 1);
    }
    FOR(i, 0, SZ(v))
    {
        w /= (SZ(v) - i);
        update(v[i], -1);
        int c = qry(v[i]);
        res += c * w;
    }
    return res;
}
vi conv(ll x) //converts x to a vector of n #s, the first L of which are < 2 the rest of which are < 5
{
    vi res;
    FOR(i, 0, N - L)
    {
        res.PB(x % 5);
        x /= 5;
    }
    FOR(i, 0, L)
    {
        res.PB(x % 2);
        x /= 2;
    }
    return res;
}

vi BlendWines(int k, vi P)
{
    N = SZ(P);
    vi ans(N);
    FOR(i, 0, N) P[i]--;
    //encode the array R1, R2, ..., Rk into:
    //block 1 of size min(12, N) containing #s 1-2
    //block 2 of the rest containig #s 3-7
    L = min(12, N);
    //you wanna encode arr[L]...arr[R]
    vi vec;
    FOR(i, 0, N)
    {
        if (P[i] >= L)
        {
            vec.PB(P[i] - L);
        }
    }
    ll x = encode(vec);
    vi res = conv(x), sse, sfi;
    FOR(i, 0, N - L)
    {
        sse.PB(res[i]);
    }
    FOR(i, N - L, N)
    {
        sfi.PB(res[i]);
    }
    int it0 = 0, it1 = 0;
    FOR(i, 0, N)
    {
        if (P[i] >= L)
        {
            ans[i] = 3 + sse.back();
            sse.pop_back();
        }
        else
        {
            ans[i] = 1 + sfi.back();
            sfi.pop_back();
        }
    }
    return ans;
}

taster

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

using namespace std;

#define PB push_back
#define LB lower_bound
#define fi first
#define se second
#define SZ(x) ((int) (x).size())
#define ALL(x) (x).begin(), (x).end()
#define FOR(i, a, b) for (auto i = (a); i < (b); i++)
#define FORD(i, a, b) for (auto i = (a) - 1; i >= (b); i--)

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

static int N, L;
static int fen[33];

static void update(int idx, int v)
{
    for (int e = idx + 1; e <= N; e += e & (-e)) fen[e] += v;
}
static int kth(int k)
{
    int res = 0;
    FORD(i, 6, 0)
    {
        if (res + (1 << i) <= N && fen[res + (1 << i)] <= k)
        {
            res += (1 << i);
            k -= fen[res];
        }
    }
    return res;
}

static ll decode(vi a, vi b) //converts this vector of #s to an integer
{
    ll res = 0;
    for (int x : a)
    {
        res *= 2;
        res += x;
    }
    for (int x : b)
    {
        res *= 5;
        res += x;
    }
    return res;
}
static vi getperm(ll x) //xth lexicographical permutation of length N-L
{
    ll ways = 1;
    FOR(i, 1, N - L + 1) ways *= i;
    vi res(N - L);
    FOR(i, 0, N - L)
    {
        update(i, 1);
    }
    FOR(i, 0, N - L)
    {
        ways /= (N - L - i);
        res[i] = kth(x / ways);
        update(res[i], -1);
        x %= ways;
    }
    return res;
}
bool ask(int i, int j)
{
    return (Compare(i, j) == -1);
}
vi sortnums(vi v)
{
    //merge-insertion sort to sort v numbers.
    // sort(ALL(v), ask); return v;
    if (SZ(v) <= 1) return v;
    map<int, int> match;
    vi t;
    for (int i = 1; i < SZ(v); i += 2)
    {
        bool b = ask(v[i - 1], v[i]);
        if (!b) swap(v[i - 1], v[i]);
        t.PB(v[i]);
        match[v[i]] = v[i - 1];
    }
    t = sortnums(t);
    vi res = t;
    res.insert(res.begin(), match[t[0]]);
    int pw = 4, l = 1, r = 3;
    while(l < SZ(t))
    {
        int j = min(pw, SZ(res)) - 1;
        FORD(i, min(r, SZ(t)), l)
        {
            while (res[j] != t[i])
            {
                j--;
            }
            res.insert(LB(res.begin(), res.begin() + j, match[t[i]], ask), match[t[i]]);
        }
        pw <<= 1;
        l = r; r = pw - r;
    }
    if (SZ(v) & 1)
    {
        res.insert(LB(ALL(res), v.back(), ask), v.back());
    }
    return res;
}

vi SortWines(int k, vi P)
{
    N = SZ(P); vi ans(N);
    L = min(12, N);
    vi n1, n2, todo;
    FOR(i, 0, N)
    {
        if (P[i] <= 2)
        {
            n1.PB(P[i] - 1);
            todo.PB(i);
        }
        else
        {
            n2.PB(P[i] - 3);
        }
    }
    ll x = decode(n1, n2);
    vi p0 = getperm(x);
    vi p1 = sortnums(todo);
    p1.resize(N);
    int cnt = 0;
    FOR(i, 0, N)
    {
        if (P[i] <= 2) continue;
        p1[L + p0[cnt]] = i;
        cnt++;
    }
    FOR(i, 0, N)
    {
        ans[p1[i]] = i + 1;
    }
    return ans;
    //you got a vector P
    //convert it to an integer, and then to an 18-permutation.
    //then, we need to sort the rest of the 12.
}

Compilation message (stderr)

bartender.cpp: In function 'vi BlendWines(int, vi)':
bartender.cpp:94:9: warning: unused variable 'it0' [-Wunused-variable]
     int it0 = 0, it1 = 0;
         ^~~
bartender.cpp:94:18: warning: unused variable 'it1' [-Wunused-variable]
     int it0 = 0, it1 = 0;
                  ^~~

• Subtask 1: 100 / 100