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  • #6499. 「雅礼集训 2018 Day2」颜色 [分块,倍增,bitset]

    bitset压位,因为是颜色数,直接倍增,重合部分不管,没了。

    // powered by c++11
    // by Isaunoya
    #include <bits/stdc++.h>
    #define rep(i, x, y) for (register int i = (x); i <= (y); ++i)
    #define Rep(i, x, y) for (register int i = (x); i >= (y); --i)
    using namespace std;
    using db = double;
    using ll = long long;
    using uint = unsigned int;
    // #define int long long
    using pii = pair<int, int>;
    #define ve vector
    #define Tp template
    #define all(v) v.begin(), v.end()
    #define sz(v) ((int)v.size())
    #define pb emplace_back
    #define fir first
    #define sec second
    // the cmin && cmax
    Tp<class T> void cmax(T& x, const T& y) {
      if (x < y) x = y;
    }
    Tp<class T> void cmin(T& x, const T& y) {
      if (x > y) x = y;
    }
    // sort , unique , reverse
    Tp<class T> void sort(ve<T>& v) { sort(all(v)); }
    Tp<class T> void unique(ve<T>& v) {
      sort(all(v));
      v.erase(unique(all(v)), v.end());
    }
    Tp<class T> void reverse(ve<T>& v) { reverse(all(v)); }
    const int SZ = 0x191981;
    struct FILEIN {
      ~FILEIN() {}
      char qwq[SZ], *S = qwq, *T = qwq, ch;
      char GETC() { return (S == T) && (T = (S = qwq) + fread(qwq, 1, SZ, stdin), S == T) ? EOF : *S++; }
      FILEIN& operator>>(char& c) {
        while (isspace(c = GETC()))
          ;
        return *this;
      }
      FILEIN& operator>>(string& s) {
        while (isspace(ch = GETC()))
          ;
        s = ch;
        while (!isspace(ch = GETC())) s += ch;
        return *this;
      }
      Tp<class T> void read(T& x) {
        bool sign = 1;
        while ((ch = GETC()) < 0x30)
          if (ch == 0x2d) sign = 0;
        x = (ch ^ 0x30);
        while ((ch = GETC()) > 0x2f) x = x * 0xa + (ch ^ 0x30);
        x = sign ? x : -x;
      }
      FILEIN& operator>>(int& x) { return read(x), *this; }
      // FILEIN& operator>>(signed& x) { return read(x), *this; }
      FILEIN& operator>>(unsigned& x) { return read(x), *this; }
    } in;
    struct FILEOUT {
      const static int LIMIT = 0x114514;
      char quq[SZ], ST[0x114];
      signed sz, O;
      ~FILEOUT() { flush(); }
      void flush() {
        fwrite(quq, 1, O, stdout);
        fflush(stdout);
        O = 0;
      }
      FILEOUT& operator<<(char c) { return quq[O++] = c, *this; }
      FILEOUT& operator<<(string str) {
        if (O > LIMIT) flush();
        for (char c : str) quq[O++] = c;
        return *this;
      }
      Tp<class T> void write(T x) {
        if (O > LIMIT) flush();
        if (x < 0) {
          quq[O++] = 0x2d;
          x = -x;
        }
        do {
          ST[++sz] = x % 0xa ^ 0x30;
          x /= 0xa;
        } while (x);
        while (sz) quq[O++] = ST[sz--];
        return;
      }
      FILEOUT& operator<<(int x) { return write(x), *this; }
      // FILEOUT& operator<<(signed x) { return write(x), *this; }
      FILEOUT& operator<<(unsigned x) { return write(x), *this; }
    } out;
    const int maxn = 1e5 + 51;
    const int S = 1400, T = 73, K = 9;
    int n, m, p, a[maxn], b[maxn], cnt;
    struct Bitset {
      uint s[maxn / 32 + 2];
      void set(uint x) { s[x >> 5] |= 1u << (x & 31); }
      int count() {
        int ans = 0;
        rep(i, 0, cnt) ans += __builtin_popcount(s[i]);
        return ans;
      }
      void clear() { memset(s, 0, sizeof(s)); }
    } f[T][K], ans, tmp;
    Bitset operator|(Bitset a, Bitset b) {
      rep(i, 0, cnt) tmp.s[i] = a.s[i] | b.s[i];
      return tmp;
    }
    int lg[T], tot, L[T], R[T], lastans = -1;
    inline int bl(int x) { return (x - 1) / S + 1; }
    void qry(int l, int r) {
      const int bL = bl(l), bR = bl(r);
      if (bL + 1 > bR - 1) {
        rep(i, l, r) ans.set(a[i]);
      } else {
        rep(i, l, R[bL]) ans.set(a[i]);
        rep(i, L[bR], r) ans.set(a[i]);
        int k = lg[(bR - 1) - (bL + 1) + 1];
        ans = ans | f[(bL + 1)][k];
        ans = ans | f[(bR - 1) - (1 << k) + 1][k];
      }
    }
    signed main() {
    #ifdef _WIN64
      freopen("testdata.in", "r", stdin);
    #else
      ios_base ::sync_with_stdio(false);
      cin.tie(nullptr), cout.tie(nullptr);
    #endif
      // code begin.
      in >> n >> m >> p;
      rep(i, 1, n) in >> a[i], b[i] = a[i];
      sort(b + 1, b + n + 1), cnt = unique(b + 1, b + n + 1) - b - 1;
      rep(i, 1, n) a[i] = lower_bound(b + 1, b + cnt + 1, a[i]) - b - 1;
      cnt = cnt - 1 >> 5, tot = bl(n);
      rep(i, 1, tot) L[i] = R[i - 1] + 1, R[i] = i * S;
      R[tot] = n;
      rep(i, 1, tot) rep(j, L[i], R[i]) f[i][0].set(a[j]);
      lg[1] = 0;
      rep(i, 2, tot) lg[i] = lg[i >> 1] + 1;
      rep(j, 1, lg[tot]) for (int i = 1; i + (1 << j) - 1 <= tot; i++) f[i][j] =
          f[i][j - 1] | f[i + (1 << j - 1)][j - 1];
      while (m--) {
        ans.clear();
        int k, l, r;
        in >> k;
        rep(i, 1, k) {
          in >> l >> r;
          if (p && lastans != -1) {
            l = (l ^ lastans) % n + 1, r = (r ^ lastans) % n + 1;
            if (l > r) l ^= r ^= l ^= r;
          }
          qry(l, r);
        }
        out << (lastans = ans.count()) << '
    ';
      }
      return 0;
      // code end.
    }
    
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  • 原文地址:https://www.cnblogs.com/Isaunoya/p/12309470.html
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