Submission #637527

#	Time	Username	Problem	Language	Result	Execution time	Memory
637527		Sam_a17	Segments (IZhO18_segments)	C++14	100 / 100	3489 ms	31120 KiB

segments

#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include "temp.cpp"
#include <cstdio>
using namespace std;

#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; print(x); cerr << endl;
#else
#define dbg(x)
#endif

#define sz(x) (int((x).size()))
#define len(x) (int)x.length()
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define clr(x) (x).clear()
#define uniq(x) x.resize(unique(all(x)) - x.begin());
#define blt __builtin_popcount

#define pb push_back
#define popf pop_front
#define popb pop_back

void print(long long t) {cerr << t;}
void print(int t) {cerr << t;}
void print(string t) {cerr << t;}
void print(char t) {cerr << t;}
void print(double t) {cerr << t;}
void print(long double t) {cerr << t;}
void print(unsigned long long t) {cerr << t;}

template <class T, class V> void print(pair <T, V> p);
template <class T> void print(vector <T> v);
template <class T> void print(set <T> v);
template <class T, class V> void print(map <T, V> v);
template <class T> void print(multiset <T> v);
template <class T, class V> void print(T v[],V n) {cerr << "["; for(int i = 0; i < n; i++) {print(v[i]); cerr << " "; } cerr << "]";}
template <class T, class V> void print(pair <T, V> p) {cerr << "{"; print(p.first); cerr << ","; print(p.second); cerr << "}";}
template <class T> void print(vector <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(set <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T> void print(multiset <T> v) {cerr << "[ "; for (T i : v) {print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void print(map <T, V> v) {cerr << "[ "; for (auto i : v) {print(i); cerr << " ";} cerr << "]";}

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
#define nl '\n'

// for grid problems
int dx[8] = {-1,0,1,0,1,-1,1,-1};
int dy[8] = {0,1,0,-1,1,1,-1,-1};

// lowest / (1 << 17) >= 1e5 / (1 << 18) >= 2e5 / (1 << 21) >= 1e6
void fastIO() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr); cout.tie(nullptr);
}
// file in/out
void setIO(string str = "") {
  fastIO();

  if (str != "") {
    freopen((str + ".in").c_str(), "r", stdin);
    freopen((str + ".out").c_str(), "w", stdout);
  }
}
// Indexed Set
template <class T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;


const long long N = 400005, inf = 1e17, S = 450;
pair<long long, long long> id[N];
int cnt = 1;

struct operations {
  struct node {
    long long l, r;
    long long get() {
      return r - l + 1;
    };

    bool operator<(node& other) {
      if(get() != other.get()) {
        return get() < other.get();
      } else if(l < other.l) {
        return l < other.l;
      } else {
        return r < other.r;
      }
    }
  };
  
  long long intersect(node a, node b) {
    a.l = max(a.l, b.l);
    a.r = min(a.r, b.r);

    return a.r - a.l + 1;
  }

  vector<long long> l[S], r[S];
  vector<node> segments, blocks[S];
  vector<node> to_add;

  void add(long long li, long long ri) {
    node curr_segment;
    curr_segment.l = li;
    curr_segment.r = ri;

    to_add.push_back(curr_segment);

    if(sz(to_add) >= S) {
      sort(all(to_add));
      vector<node> new_segments;

      int it1 = 0, it2 = 0;
      while(it1 < sz(segments) || it2 < sz(to_add)) {
        if(it1 == sz(segments)) {
          new_segments.push_back(to_add[it2++]);
        } else if(it2 == sz(to_add)) {
          new_segments.push_back(segments[it1++]);
        } else if(segments[it1] < to_add[it2]) {
          new_segments.push_back(segments[it1++]);
        } else {
          new_segments.push_back(to_add[it2++]);
        }
      }

      segments.swap(new_segments);

      for(int i = 0; i < S; i++) {
        blocks[i].clear();
        l[i].clear(), r[i].clear();
      }

      for(int i = 0; i < sz(segments); i++) {
        l[i / S].push_back(segments[i].l);
        r[i / S].push_back(segments[i].r);
        blocks[i / S].push_back(segments[i]);
      }

      for(int i = 0; i < S; i++) {
        sort(all(l[i]));
        sort(all(r[i]));
      }

      to_add.clear();
    }
  }

  long long get(long long li, long long ri, long long k) {
    long long answ = 0;
    node curr_segment;
    curr_segment.l = li;
    curr_segment.r = ri;
    
    for(int i = 0; i < S; i++) {
      if(blocks[i].empty()) continue;

      if(blocks[i].front().get() >= k) {
        answ += sz(blocks[i]);
        answ -= sz(l[i]) - (lower_bound(all(l[i]), ri - k + 2) - l[i].begin());
        answ -= (upper_bound(all(r[i]), li + k - 2) - r[i].begin());
      } else if(blocks[i].back().get() >= k) {
        for(auto j: blocks[i]) {
          if(intersect(j, curr_segment) >= k) {
            answ++;
          }
        }
      }
    }
  
    for(auto i: to_add) {
      if(intersect(i, curr_segment) >= k) {
        answ++;
      }
    }

    return answ;
  }
} adding, deleting;

void solve_() {
  long long n, t; cin >> n >> t;

  long long cnt = 1, last_ans = 0;

  while(n--) {
    long long tt; cin >> tt;
    if(tt == 1) {
      int l, r; cin >> l >> r;
      l = l ^ (t * last_ans);
      r = r ^ (t * last_ans);
      if(l > r) {
        swap(l, r);
      }

      id[cnt] = {l, r}; cnt++;
      adding.add(l, r);
    } else if(tt == 2) {
      long long ind; cin >> ind;
      long long l = id[ind].first, r = id[ind].second;
      deleting.add(l, r);
    } else {
      long long l, r, k; cin >> l >> r >> k;
      l = l ^ (t * last_ans);
      r = r ^ (t * last_ans);
      if(l > r) {
        swap(l, r);
      }
      
      long long answ = adding.get(l, r, k) - deleting.get(l, r, k); 
      printf("%lld\n", answ);
      last_ans = answ;
    }
  }
}

int main() {
  setIO();

  auto solve = [&](int test_case)-> void {
    while(test_case--) {
      solve_();
    }
  };

  int test_cases = 1;
  solve(test_cases);

  return 0;
}

Compilation message (stderr)

segments.cpp: In function 'void setIO(std::string)':
segments.cpp:63:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |     freopen((str + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
segments.cpp:64:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |     freopen((str + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 15 / 15
• Subtask 3: 16 / 16
• Subtask 4: 17 / 17
• Subtask 5: 20 / 20
• Subtask 6: 25 / 25