Submission #1094359

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094359		cpptowin	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	0 / 100	244 ms	262144 KiB

sortbooks

#include <bits/stdc++.h>
#define fo(i, d, c) for (int i = d; i <= c; i++)
#define fod(i, c, d) for (int i = c; i >= d; i--)
#define maxn 1000010
#define N 1010
#define fi first
#define se second
#define pb emplace_back
#define en cout << "\n";
#define bitcount(x) __builtin_popcountll(x)
#define pii pair<int, int>
#define vii vector<pii>
#define lb(x) x & -x
#define bit(i, j) ((i >> j) & 1)
#define offbit(i, j) (i ^ (1LL << j))
#define onbit(i, j) (i | (1LL << j))
#define vi vector<int>
#define all(x) x.begin(), x.end()
#define ss(x) (int)x.size()
template <typename T1, typename T2>
bool minimize(T1 &a, T2 b)
{
    if (a > b)
    {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
bool maximize(T1 &a, T2 b)
{
    if (a < b)
    {
        a = b;
        return true;
    }
    return false;
}
using namespace std;
static struct FastInput
{
    static constexpr int BUF_SIZE = 1 << 20;
    char buf[BUF_SIZE];
    size_t chars_read = 0;
    size_t buf_pos = 0;
    FILE *in = stdin;
    char cur = 0;
 
    inline char get_char()
    {
        if (buf_pos >= chars_read)
        {
            chars_read = fread(buf, 1, BUF_SIZE, in);
            buf_pos = 0;
            buf[0] = (chars_read == 0 ? -1 : buf[0]);
        }
        return cur = buf[buf_pos++];
    }
 
    inline void tie(int) {}
 
    inline explicit operator bool()
    {
        return cur != -1;
    }
 
    inline static bool is_blank(char c)
    {
        return c <= ' ';
    }
 
    inline bool skip_blanks()
    {
        while (is_blank(cur) && cur != -1)
        {
            get_char();
        }
        return cur != -1;
    }
 
    inline FastInput &operator>>(char &c)
    {
        skip_blanks();
        c = cur;
        return *this;
    }
 
    inline FastInput &operator>>(string &s)
    {
        if (skip_blanks())
        {
            s.clear();
            do
            {
                s += cur;
            } while (!is_blank(get_char()));
        }
        return *this;
    }
 
    template <typename T>
    inline FastInput &read_integer(T &n)
    {
        // unsafe, doesn't check that characters are actually digits
        n = 0;
        if (skip_blanks())
        {
            int sign = +1;
            if (cur == '-')
            {
                sign = -1;
                get_char();
            }
            do
            {
                n += n + (n << 3) + cur - '0';
            } while (!is_blank(get_char()));
            n *= sign;
        }
        return *this;
    }
 
    template <typename T>
    inline typename enable_if<is_integral<T>::value, FastInput &>::type operator>>(T &n)
    {
        return read_integer(n);
    }
 
#if !defined(_WIN32) || defined(_WIN64)
    inline FastInput &operator>>(__int128 &n)
    {
        return read_integer(n);
    }
#endif
 
    template <typename T>
    inline typename enable_if<is_floating_point<T>::value, FastInput &>::type operator>>(T &n)
    {
        // not sure if really fast, for compatibility only
        n = 0;
        if (skip_blanks())
        {
            string s;
            (*this) >> s;
            sscanf(s.c_str(), "%lf", &n);
        }
        return *this;
    }
} fast_input;
 
#define cin fast_input
 
static struct FastOutput
{
    static constexpr int BUF_SIZE = 1 << 20;
    char buf[BUF_SIZE];
    size_t buf_pos = 0;
    static constexpr int TMP_SIZE = 1 << 20;
    char tmp[TMP_SIZE];
    FILE *out = stdout;
 
    inline void put_char(char c)
    {
        buf[buf_pos++] = c;
        if (buf_pos == BUF_SIZE)
        {
            fwrite(buf, 1, buf_pos, out);
            buf_pos = 0;
        }
    }
 
    ~FastOutput()
    {
        fwrite(buf, 1, buf_pos, out);
    }
 
    inline FastOutput &operator<<(char c)
    {
        put_char(c);
        return *this;
    }
 
    inline FastOutput &operator<<(const char *s)
    {
        while (*s)
        {
            put_char(*s++);
        }
        return *this;
    }
 
    inline FastOutput &operator<<(const string &s)
    {
        for (int i = 0; i < (int)s.size(); i++)
        {
            put_char(s[i]);
        }
        return *this;
    }
 
    template <typename T>
    inline char *integer_to_string(T n)
    {
        // beware of TMP_SIZE
        char *p = tmp + TMP_SIZE - 1;
        if (n == 0)
        {
            *--p = '0';
        }
        else
        {
            bool is_negative = false;
            if (n < 0)
            {
                is_negative = true;
                n = -n;
            }
            while (n > 0)
            {
                *--p = (char)('0' + n % 10);
                n /= 10;
            }
            if (is_negative)
            {
                *--p = '-';
            }
        }
        return p;
    }
 
    template <typename T>
    inline typename enable_if<is_integral<T>::value, char *>::type stringify(T n)
    {
        return integer_to_string(n);
    }
 
#if !defined(_WIN32) || defined(_WIN64)
    inline char *stringify(__int128 n)
    {
        return integer_to_string(n);
    }
#endif
 
    template <typename T>
    inline typename enable_if<is_floating_point<T>::value, char *>::type stringify(T n)
    {
        sprintf(tmp, "%.17f", n);
        return tmp;
    }
 
    template <typename T>
    inline FastOutput &operator<<(const T &n)
    {
        auto p = stringify(n);
        for (; *p != 0; p++)
        {
            put_char(*p);
        }
        return *this;
    }
} fast_output;
 
#define cout fast_output
const int nsqrt = 450;
const int mod = 1e9 + 7;
void add(int &x, int k)
{
    x += k;
    x %= mod;
    if (x < 0)
        x += mod;
}
void del(int &x, int k)
{
    x -= k;
    x %= mod;
    if (x < 0)
        x += mod;
}
const int MAXN = (int)3e5 + 9;
const int MAXV = (int)1e9 + 9; //maximum value of any element in array

//array values can be negative too, use appropriate minimum and maximum value
struct wavelet_tree {
  int lo, hi;
  wavelet_tree *l, *r;
  int *b, *c, bsz, csz; // c holds the prefix sum of elements

  wavelet_tree() {
    lo = 1;
    hi = 0;
    bsz = 0;
    csz = 0, l = NULL;
    r = NULL;
  }

  void init(int *from, int *to, int x, int y) {
    lo = x, hi = y;
    if(from >= to) return;
    int mid = (lo + hi) >> 1;
    auto f = [mid](int x) {
      return x <= mid;
    };
    b = (int*)malloc((to - from + 2) * sizeof(int));
    bsz = 0;
    b[bsz++] = 0;
    c = (int*)malloc((to - from + 2) * sizeof(int));
    csz = 0;
    c[csz++] = 0;
    for(auto it = from; it != to; it++) {
      b[bsz] = (b[bsz - 1] + f(*it));
      c[csz] = (c[csz - 1] + (*it));
      bsz++;
      csz++;
    }
    if(hi == lo) return;
    auto pivot = stable_partition(from, to, f);
    l = new wavelet_tree();
    l->init(from, pivot, lo, mid);
    r = new wavelet_tree();
    r->init(pivot, to, mid + 1, hi);
  }
  //kth smallest element in [l, r]
  //for array [1,2,1,3,5] 2nd smallest is 1 and 3rd smallest is 2
  int kth(int l, int r, int k) {
    if(l > r) return 0;
    if(lo == hi) return lo;
    int inLeft = b[r] - b[l - 1], lb = b[l - 1], rb = b[r];
    if(k <= inLeft) return this->l->kth(lb + 1, rb, k);
    return this->r->kth(l - lb, r - rb, k - inLeft);
  }
  //count of numbers in [l, r] Less than or equal to k
  int LTE(int l, int r, int k) {
    if(l > r || k < lo) return 0;
    if(hi <= k) return r - l + 1;
    int lb = b[l - 1], rb = b[r];
    return this->l->LTE(lb + 1, rb, k) + this->r->LTE(l - lb, r - rb, k);
  }
  //count of numbers in [l, r] equal to k
  int count(int l, int r, int k) {
    if(l > r || k < lo || k > hi) return 0;
    if(lo == hi) return r - l + 1;
    int lb = b[l - 1], rb = b[r];
    int mid = (lo + hi) >> 1;
    if(k <= mid) return this->l->count(lb + 1, rb, k);
    return this->r->count(l - lb, r - rb, k);
  }
  //sum of numbers in [l ,r] less than or equal to k
  int sum(int l, int r, int k) {
    if(l > r or k < lo) return 0;
    if(hi <= k) return c[r] - c[l - 1];
    int lb = b[l - 1], rb = b[r];
    return this->l->sum(lb + 1, rb, k) + this->r->sum(l - lb, r - rb, k);
  }
  ~wavelet_tree() {
    delete l;
    delete r;
  }
}tree;
struct BIT
{
    int t[maxn];
    BIT()
    {
        fo(i, 0, maxn - 1) t[i] = -1;
    }
    void up(int x, int val)
    {
        for (; x < maxn; x += lb(x))
            maximize(t[x], val);
    }
    void clear(int x)
    {
        for (; x < maxn; x += lb(x))
            t[x] = -1;
    }
    int get(int x)
    {
        int ans = -1;
        for (; x; x -= lb(x))
            maximize(ans, t[x]);
        return ans;
    }
} minn;
struct BIT1
{
    int t[maxn];
    BIT1()
    {
        fo(i, 1, maxn - 1) t[i] = -1;
    }
    void up(int x, int val)
    {
        for (; x; x -= lb(x))
            maximize(t[x], val);
    }
    void clear(int x)
    {
        for (; x; x -= lb(x))
            t[x] = -1;
    }
    int get(int x)
    {
        int ans = -1;
        for (; x < maxn; x += lb(x))
            maximize(ans, t[x]);
        return ans;
    }
} maxx;
int n, q, a[maxn];
int res[maxn];
int sum[maxn];
int maxl[maxn];
vi nen;
int arr[maxn];
void calc(int l, int r, vector<array<int, 4>> qry)
{
    int mid = l + r >> 1;
    maxl[mid] = a[mid];
    fod(i, mid - 1, l)
    {
        maxl[i] = max(maxl[i + 1], a[i]);
        minn.up(arr[i + 1], a[i + 1]);
        int x = minn.get(arr[i] - 1);
        if (x != -1)
            sum[i] = x + a[i];
        maximize(sum[i], sum[i + 1]);
    }
    fo(i, mid + 2, r)
    {
        maxx.up(arr[i - 1], a[i - 1]);
        int x = maxx.get(arr[i] + 1);
        if (x != -1)
            sum[i] = x + a[i];
        maximize(sum[i], sum[i - 1]);
    }
    fod(i, mid, l) minn.clear(arr[i]);
    fo(i, mid + 1, r) maxx.clear(arr[i]);
    vector<array<int, 4>> ll, rr;
    for (auto [l, r, val, id] : qry)
        if (l != r)
        {
            if (l <= mid and r >= mid)
            {
                if (max(sum[l], sum[r]) > val)
                    res[id] = 1;
                else
                {
                    int L = max(val - maxl[l], 0);
                    if (tree.LTE(mid + 1, r, maxl[l] - 1) -
                            tree.LTE(mid + 1, r, L) >
                        0)
                        res[id] = 1;
                }
            }
            else if (r < mid)
                ll.push_back({l, r, val, id});
            else if (l > mid)
                rr.push_back({l, r, val, id});
        }
    fo(i,l,r) sum[i] = maxl[i] = 0;
    if (l != r)
    {
        calc(l, mid, ll);
        calc(mid + 1, r, rr);
    }
}
main()
{
#define name "TASK"
    if (fopen(name ".inp", "r"))
    {
        freopen(name ".inp", "r", stdin);
        freopen(name ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> q;
    fo(i, 1, n)
    {
        cin >> a[i];
        nen.pb(a[i]);
    }
    tree.init(a + 1,a + n + 1,-MAXV,MAXV);
    sort(all(nen));
    nen.erase(unique(all(nen)), nen.end());
    fo(i,1,n) arr[i] = lower_bound(all(nen),a[i]) - nen.begin() + 1;
    vector<array<int, 4>> qry(q);
    fo(i, 0, q - 1)
    {
        cin >> qry[i][0] >> qry[i][1] >> qry[i][2];
        qry[i][3] = i + 1;
    }
    calc(1, n, qry);
    fo(i, 1, q) cout << (res[i] ^ 1) << "\n";
}

Compilation message (stderr)

sortbooks.cpp: In function 'void calc(int, int, std::vector<std::array<int, 4> >)':
sortbooks.cpp:419:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  419 |     int mid = l + r >> 1;
      |               ~~^~~
sortbooks.cpp: At global scope:
sortbooks.cpp:469:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  469 | main()
      | ^~~~
sortbooks.cpp: In function 'int main()':
sortbooks.cpp:478:13: warning: passing NULL to non-pointer argument 1 of 'void FastInput::tie(int)' [-Wconversion-null]
  478 |     cin.tie(NULL);
      |             ^~~~
sortbooks.cpp:61:21: note:   declared here
   61 |     inline void tie(int) {}
      |                     ^~~
sortbooks.cpp:474:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  474 |         freopen(name ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
sortbooks.cpp:475:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  475 |         freopen(name ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23