Luzhiled's Library

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View the Project on GitHub ei1333/library

:heavy_check_mark: test/verify/aoj-dsl-2-d.test.cpp

Depends on

Code

#define PROBLEM "http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=DSL_2_D"

#include "../../template/template.hpp"

#include "../../structure/segment-tree/dual-segment-tree.hpp"

int main() {
  int N, Q;
  cin >> N >> Q;
  auto h = [](int a, int b) { return b; };
  auto seg = get_dual_segment_tree(N, h, INT_MAX);
  while(Q--) {
    int com;
    cin >> com;
    if(com == 0) {
      int l, r, x;
      cin >> l >> r >> x;
      seg.update(l, r + 1, x);
    } else if(com == 1) {
      int k;
      cin >> k;
      cout << seg[k] << "\n";
    }
  }
}
#line 1 "test/verify/aoj-dsl-2-d.test.cpp"
#define PROBLEM "http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=DSL_2_D"

#line 1 "template/template.hpp"
#include<bits/stdc++.h>

using namespace std;

using int64 = long long;
const int mod = 1e9 + 7;

const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;

struct IoSetup {
  IoSetup() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
    cerr << fixed << setprecision(10);
  }
} iosetup;

template< typename T1, typename T2 >
ostream &operator<<(ostream &os, const pair< T1, T2 >& p) {
  os << p.first << " " << p.second;
  return os;
}

template< typename T1, typename T2 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
  is >> p.first >> p.second;
  return is;
}

template< typename T >
ostream &operator<<(ostream &os, const vector< T > &v) {
  for(int i = 0; i < (int) v.size(); i++) {
    os << v[i] << (i + 1 != v.size() ? " " : "");
  }
  return os;
}

template< typename T >
istream &operator>>(istream &is, vector< T > &v) {
  for(T &in : v) is >> in;
  return is;
}

template< typename T1, typename T2 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }

template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }

template< typename T = int64 >
vector< T > make_v(size_t a) {
  return vector< T >(a);
}

template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
  return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}

template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
  t = v;
}

template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
  for(auto &e : t) fill_v(e, v);
}

template< typename F >
struct FixPoint : F {
  explicit FixPoint(F &&f) : F(forward< F >(f)) {}

  template< typename... Args >
  decltype(auto) operator()(Args &&... args) const {
    return F::operator()(*this, forward< Args >(args)...);
  }
};
 
template< typename F >
inline decltype(auto) MFP(F &&f) {
  return FixPoint< F >{forward< F >(f)};
}
#line 4 "test/verify/aoj-dsl-2-d.test.cpp"

#line 1 "structure/segment-tree/dual-segment-tree.hpp"
/**
 * @brief Dual-Segment-Tree(双対セグメント木)
 * @docs docs/dual-segment-tree.md
 */
template< typename E, typename H >
struct DualSegmentTree {
  int sz, height;
  vector< E > lazy;
  const H h;
  const E ei;

  DualSegmentTree(int n, const H h, const E &ei) : h(h), ei(ei) {
    sz = 1;
    height = 0;
    while(sz < n) sz <<= 1, height++;
    lazy.assign(2 * sz, ei);
  }

  inline void propagate(int k) {
    if(lazy[k] != ei) {
      lazy[2 * k + 0] = h(lazy[2 * k + 0], lazy[k]);
      lazy[2 * k + 1] = h(lazy[2 * k + 1], lazy[k]);
      lazy[k] = ei;
    }
  }

  inline void thrust(int k) {
    for(int i = height; i > 0; i--) propagate(k >> i);
  }

  void update(int a, int b, const E &x) {
    thrust(a += sz);
    thrust(b += sz - 1);
    for(int l = a, r = b + 1; l < r; l >>= 1, r >>= 1) {
      if(l & 1) lazy[l] = h(lazy[l], x), ++l;
      if(r & 1) --r, lazy[r] = h(lazy[r], x);
    }
  }

  E operator[](int k) {
    thrust(k += sz);
    return lazy[k];
  }
};

template< typename E, typename H >
DualSegmentTree< E, H > get_dual_segment_tree(int N, const H& h, const E& ei) {
  return {N, h, ei};
}
#line 6 "test/verify/aoj-dsl-2-d.test.cpp"

int main() {
  int N, Q;
  cin >> N >> Q;
  auto h = [](int a, int b) { return b; };
  auto seg = get_dual_segment_tree(N, h, INT_MAX);
  while(Q--) {
    int com;
    cin >> com;
    if(com == 0) {
      int l, r, x;
      cin >> l >> r >> x;
      seg.update(l, r + 1, x);
    } else if(com == 1) {
      int k;
      cin >> k;
      cout << seg[k] << "\n";
    }
  }
}
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