Submission #914059

#	Time	Username	Problem	Language	Result	Execution time	Memory
914059		cig32	Railway Trip 2 (JOI22_ho_t4)	C++17	Compilation error	0 ms	0 KiB

Main

#include "bits/stdc++.h"
using namespace std;
//#define int long long
#define double long double
const int MAXN = 2e5 + 10;
const int MOD = 1e9 + 7;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
int rnd(int x, int y) {
  int u = uniform_int_distribution<int>(x, y)(rng); return u;
}
int bm(int b, int p) {
  if(p==0) return 1 % MOD;
  int r = bm(b, p >> 1);
  if(p&1) return (((r*r) % MOD) * b) % MOD;
  return (r*r) % MOD;
}
int inv(int b) { 
  return bm(b, MOD-2);
}
int fastlog(int x) {
  return (x == 0 ? -1 : 64 - __builtin_clzll(x) - 1);
}
void printcase(int i) { cout << "Case #" << i << ": "; }
static void run_with_stack_size(void (*func)(void), size_t stsize) {
  char *stack, *send;
  stack = (char *)malloc(stsize);
  send = stack + stsize - 16;
  send = (char *)((uintptr_t)send / 16 * 16);
  asm volatile(
    "mov %%rsp, (%0)\n"
    "mov %0, %%rsp\n"
    :
    : "r"(send));
  func();
  asm volatile("mov (%0), %%rsp\n" : : "r"(send));
  free(stack);
}
struct segtree_basic {
  struct node {
    int lazyval, mi, ma, sum; char lazytag;
    int len; // not changing
  };
  int stok;
  vector<node> st;
  void bu(int l, int r, int idx) {
    st[idx].lazyval = st[idx].mi = st[idx].ma = st[idx].sum = 0;
    st[idx].lazytag = '?';
    st[idx].len = r - l + 1;
    if(l == r) {
      return;
    }
    int mid = (l + r) >> 1;
    bu(l, mid, 2*idx+1);
    bu(mid+1, r, 2*idx+2);
  }
  void push_down(int idx) {
    if(st[idx].lazytag == '?') return;
    if(st[idx].lazytag == ':') {
      st[2*idx+1].lazyval = st[idx].lazyval;
      st[2*idx+1].mi = st[idx].lazyval;
      st[2*idx+1].ma = st[idx].lazyval;
      st[2*idx+1].sum = st[idx].lazyval * st[2*idx+1].len;
      st[2*idx+1].lazytag = ':';
 
      st[2*idx+2].lazyval = st[idx].lazyval;
      st[2*idx+2].mi = st[idx].lazyval;
      st[2*idx+2].ma = st[idx].lazyval;
      st[2*idx+2].sum = st[idx].lazyval * st[2*idx+2].len;
      st[2*idx+2].lazytag = ':';
 
    }
    else {
      st[2*idx+1].lazyval += st[idx].lazyval;
      st[2*idx+1].mi += st[idx].lazyval;
      st[2*idx+1].ma += st[idx].lazyval;
      st[2*idx+1].sum += st[idx].lazyval * st[2*idx+1].len;
      st[2*idx+1].lazytag = (st[2*idx+1].lazytag == ':' ? ':' : '+');
 
      st[2*idx+2].lazyval += st[idx].lazyval;
      st[2*idx+2].mi += st[idx].lazyval;
      st[2*idx+2].ma += st[idx].lazyval;
      st[2*idx+2].sum += st[idx].lazyval * st[2*idx+2].len;
      st[2*idx+2].lazytag = (st[2*idx+2].lazytag == ':' ? ':' : '+');
    }
    st[idx].lazytag = '?';
    st[idx].lazyval = 0;
  }
  void push_up(int idx) {
    st[idx].mi = min(st[2*idx+1].mi, st[2*idx+2].mi);
    st[idx].ma = max(st[2*idx+1].ma, st[2*idx+2].ma);
    st[idx].sum = st[2*idx+1].sum + st[2*idx+2].sum;
  }
  void u1(int l, int r, int constl, int constr, int idx, int val) { // range := v
    if(l <= constl && constr <= r) {
      st[idx].lazyval = val;
      st[idx].mi = val;
      st[idx].ma = val;
      st[idx].sum = val * st[idx].len;
      st[idx].lazytag = ':';
      return;
    }
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) u1(l, r, mid+1, constr, 2*idx+2, val);
    else if(constr < l || r < mid + 1) u1(l, r, constl, mid, 2*idx+1, val);
    else {
      u1(l, r, constl, mid, 2*idx+1, val);
      u1(l, r, mid+1, constr, 2*idx+2, val);
    }
    push_up(idx);
  }
 
  void u2(int l, int r, int constl, int constr, int idx, int val) { // range += v
    if(l <= constl && constr <= r) {
      st[idx].lazyval += val;
      st[idx].mi += val;
      st[idx].ma += val;
      st[idx].sum += val * st[idx].len;
      st[idx].lazytag = (st[idx].lazytag == ':' ? ':' : '+');
      return;
    }
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) u2(l, r, mid+1, constr, 2*idx+2, val);
    else if(constr < l || r < mid + 1) u2(l, r, constl, mid, 2*idx+1, val);
    else {
      u2(l, r, constl, mid, 2*idx+1, val);
      u2(l, r, mid+1, constr, 2*idx+2, val);
    }
    push_up(idx);
  }
 
  int qu1(int l, int r, int constl, int constr, int idx) { // range min
    if(l <= constl && constr <= r) return st[idx].mi;
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) return qu1(l, r, mid+1, constr, 2*idx+2);
    else if(constr < l || r < mid + 1) return qu1(l, r, constl, mid, 2*idx+1);
    else {
      return min(qu1(l, r, constl, mid, 2*idx+1), qu1(l, r, mid+1, constr, 2*idx+2));
    }
  }
 
  int qu2(int l, int r, int constl, int constr, int idx) { // range max
    if(l <= constl && constr <= r) return st[idx].ma;
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) return qu2(l, r, mid+1, constr, 2*idx+2); 
    else if(constr < l || r < mid + 1) return qu2(l, r, constl, mid, 2*idx+1);
    else {
      return max(qu2(l, r, constl, mid, 2*idx+1), qu2(l, r, mid+1, constr, 2*idx+2));
    }
  }
  int qu3(int l, int r, int constl, int constr, int idx) { // range sum
    if(l <= constl && constr <= r) return st[idx].sum;
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) return qu3(l, r, mid+1, constr, 2*idx+2);
    else if(constr < l || r < mid + 1) return qu3(l, r, constl, mid, 2*idx+1);
    else {
      return qu3(l, r, constl, mid, 2*idx+1) + qu3(l, r, mid+1, constr, 2*idx+2);
    }
  }
  int qu4(int l, int r, int constl, int constr, int idx, int val) { // first at least v
    if(l <= constl && constr <= r) {
      if(st[idx].ma < val) return -1;
      while(constl < constr) {
        int mid = (constl + constr) >> 1;
        push_down(idx);
        if(st[2*idx+1].ma >= val) constr = mid, idx = 2*idx + 1;
        else constl = mid+1, idx = 2*idx + 2;
      }
      return constl;
    }
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) return qu4(l, r, mid+1, constr, 2*idx+2, val);
    else if(constr < l || r < mid + 1) return qu4(l, r, constl, mid, 2*idx+1, val);
    else {
      int lchild = qu4(l, r, constl, mid, 2*idx+1, val);
      if(lchild != -1) return lchild;
      return qu4(l, r, mid+1, constr, 2*idx+2, val);
    }
  }
  int qu5(int l, int r, int constl, int constr, int idx, int val) { // first at most v
    if(l <= constl && constr <= r) {
      if(st[idx].mi > val) return -1;
      while(constl < constr) {
        int mid = (constl + constr) >> 1;
        push_down(idx);
        if(st[2*idx+1].mi <= val) constr = mid, idx = 2*idx + 1;
        else constl = mid+1, idx = 2*idx + 2;
      }
      return constl;
    }
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) return qu5(l, r, mid+1, constr, 2*idx+2, val);
    else if(constr < l || r < mid + 1) return qu5(l, r, constl, mid, 2*idx+1, val);
    else {
      int lchild = qu5(l, r, constl, mid, 2*idx+1, val);
      if(lchild != -1) return lchild;
      return qu5(l, r, mid+1, constr, 2*idx+2, val);
    }
  }
  int qu6(int l, int r, int constl, int constr, int idx, int val) { // last at least v
    if(l <= constl && constr <= r) {
      if(st[idx].ma < val) return -1;
      while(constl < constr) {
        int mid = (constl + constr) >> 1;
        push_down(idx);
        if(st[2*idx+2].ma >= val) constl = mid+1, idx = 2*idx + 2;
        else constr = mid, idx = 2*idx + 1;
      }
      return constl;
    }
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) return qu6(l, r, mid+1, constr, 2*idx+2, val);
    else if(constr < l || r < mid + 1) return qu6(l, r, constl, mid, 2*idx+1, val);
    else {
      int rchild = qu6(l, r, mid+1, constr, 2*idx+2, val);
      if(rchild != -1) return rchild;
      return qu6(l, r, constl, mid, 2*idx+1, val);
    }
  }
  int qu7(int l, int r, int constl, int constr, int idx, int val) { // last at most v
    if(l <= constl && constr <= r) {
      if(st[idx].mi > val) return -1;
      while(constl < constr) {
        int mid = (constl + constr) >> 1;
        push_down(idx);
        if(st[2*idx+2].mi <= val) constl = mid+1, idx = 2*idx + 2;
        else constr = mid, idx = 2*idx + 1;
      }
      return constl;
    }
    int mid = (constl + constr) >> 1;
    push_down(idx);
    if(mid < l || r < constl) return qu7(l, r, mid+1, constr, 2*idx+2, val);
    else if(constr < l || r < mid + 1) return qu7(l, r, constl, mid, 2*idx+1, val);
    else {
      int rchild = qu7(l, r, mid+1, constr, 2*idx+2, val);
      if(rchild != -1) return rchild;
      return qu7(l, r, constl, mid, 2*idx+1, val);
    }
  }
  public:
  void resize(int k) {
    st.resize(4*k + 10);
    stok = k;
    bu(0, k, 0);
  }
  void range_assign(int l, int r, int v) { u1(l, r, 0, stok, 0, v); }
 
  void range_add(int l, int r, int v) { u2(l, r, 0, stok, 0, v); }
 
  int query_min(int l, int r) { return qu1(l, r, 0, stok, 0); }
 
  int query_max(int l, int r) { return qu2(l, r, 0, stok, 0); }
 
  int query_sum(int l, int r) { return qu3(l, r, 0, stok, 0); }
 
  int query_firstAtLeast(int l, int r, int v) { return qu4(l, r, 0, stok, 0, v); }
 
  int query_firstAtMost(int l, int r, int v) { return qu5(l, r, 0, stok, 0, v); }
 
  int query_lastAtLeast(int l, int r, int v) { return qu6(l, r, 0, stok, 0, v); } 
 
  int query_lastAtMost(int l, int r, int v) { return qu7(l, r, 0, stok, 0, v); }
};

struct segtree_small {
  struct node {
    int mn = 0, mx = 0;
  };
  vector<node> st;
  int stok;
  void u(int l, int r, int tar, int idx, int val) {
    if(l == r) {
      st[idx].mn = val;
      st[idx].mx = val;
      return;
    }
    int mid = (l + r) >> 1;
    if(tar <= mid) u(l, mid, tar, (idx<<1) + 1, val);
    else u(mid+1, r, tar, (idx<<1) + 2, val);
    st[idx].mn = min(st[(idx<<1) + 1].mn, st[(idx<<1) + 2].mn);
    st[idx].mx = max(st[(idx<<1) + 1].mx, st[(idx<<1) + 2].mx);
  }
  int qu1(int l, int r, int constl, int constr, int idx) {
    if(l <= constl && constr <= r) return st[idx].mn;
    int mid = (constl + constr) >> 1;
    if(mid < l || r < constl) return qu1(l, r, mid+1, constr, (idx<<1) + 2);
    else if(constr < l || r < mid+1) return qu1(l, r, constl, mid, (idx<<1) + 1, val);
    else return min(qu1(l, r, constl, mid, (idx<<1) + 1), qu1(l, r, mid+1, constr, (idx<<1) + 2));
  }
  int qu2(int l, int r, int constl, int constr, int idx) {
    if(l <= constl && constr <= r) return st[idx].mx;
    int mid = (constl + constr) >> 1;
    if(mid < l || r < constl) return qu2(l, r, mid+1, constr, (idx<<1) + 2);
    else if(constr < l || r < mid+1) return qu2(l, r, constl, mid, (idx<<1) + 1, val);
    else return max(qu2(l, r, constl, mid, (idx<<1) + 1), qu2(l, r, mid+1, constr, (idx<<1) + 2));
  }
  public:
  void resize(int k) {
    st.resize(4*k + 10);
    stok = k;
  }
  void upd(int i, int v) {
    u(0, stok, i, 0, v);
  }
  int query_min(int l, int r) {
    return qu1(l, r, 0, stok, 0);
  }
  int query_max(int l, int r) {
    return qu2(l, r, 0, stok, 0);
  }
};
bool cmp(pair<int, int> x, pair<int, int> y) {
  return x.second < y.second;
}
void solve(int tc) {
  int n, k, m;
  cin >> n >> k >> m;
  segtree_basic M, P;
  M.resize(n);
  P.resize(n);
  for(int i=1; i<=n; i++) {
    M.range_add(i, i, i);
    P.range_add(i, i, i);
  }
  vector<pair<int, int>> updates;
  for(int i=1; i<=m; i++) {
    int a, b;
    cin >> a >> b;
    updates.push_back({a, b});
  }
  sort(updates.begin(), updates.end(), cmp);
  for(pair<int, int> x: updates) {
    int a = x.first, b = x.second;
    if(a > b) continue;
    int l = a, r = min(b, a + k - 1);
    M.range_assign(l, r, b);
  }
  reverse(updates.begin(), updates.end());
  for(pair<int, int> x: updates) {
    int a = x.first, b = x.second;
    if(a < b) continue;
    int l = max(b, a - k + 1), r = a;
    P.range_assign(l, r, b);
  }
  pair<int, int> st[18][n+1];
  for(int i=1; i<=n; i++) {
    int v = M.query_sum(i, i);
    st[0][i].second = v;
    v = P.query_sum(i, i);
    st[0][i].first = v;
  }
  segtree_small susopen[18][2];
  for(int i=0; i<18; i++) {
    for(int j=0; j<2; j++) {
      susopen[i][j].resize(n);

    }
  }
  for(int i=1; i<=n; i++) {
    susopen[0][0].upd(i, st[0][i].first);
    susopen[0][1].upd(i, st[0][i].second);
  }
  for(int i=1; i<18; i++) {
    for(int j=1; j<=n; j++) {
      pair<int, int> bruh = st[i-1][j];
      int l = bruh.first, r = bruh.second;
      int newl = susopen[i-1][0].query_min(l, r);
      int newr = susopen[i-1][1].query_max(l, r);
      st[i][j].second = newr;
      susopen[i][1].upd(j, newr);
      st[i][j].first = newl;
      susopen[i][0].upd(j, newl);
    }
  }
  int q;
  cin >> q;
  while(q--) {
    int s, t;
    cin >> s >> t;
    if((M.query_max(s, s) >= t && s < t) || (P.query_min(s, s) <= t && s > t)) {
      cout << "1\n"; continue;
    }
    int l = s, r = s, S = 0;
    for(int i=17; i>=0; i--) {
      int m1 = susopen[i][0].query_min(l, r);
      int m2 = susopen[i][1].query_max(l, r);
      int getl = P.query_min(m1, m2);
      int getr = M.query_max(m1, m2);
      if((s < t && getr < t) || (s > t && getl > t)) {
        S += (1 << i);
        l = m1;
        r = m2;
      }
    }
    S++;
    int m1 = susopen[0][0].query_min(l, r);
    int m2 = susopen[0][1].query_max(l, r);
    l = m1;
    r = m2;
    int getr = M.query_max(l, r);
    int getl = P.query_min(l, r);
    if((s < t && getr < t) || (s > t && getl > t)) S = 1e9;
    cout << (S >= 1e7 ? -1 : S + 1) << '\n';
  }

  //cout << st[0][9].first << ' ' << st[0][9].second << '\n';
  //cout << st[1][9].first << ' ' << st[1][9].second << '\n';
}
void uwu() {
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; //cin >> t;
  for(int i=1; i<=t; i++) solve(i);
}
int32_t main() {
  #ifdef ONLINE_JUDGE
  uwu();
  #endif
  #ifndef ONLINE_JUDGE
  run_with_stack_size(uwu, 1024 * 1024 * 1024); // run with a 1 GiB stack
  #endif
}
/*
g++ A.cpp -std=c++17 -O2 -o A
./A < input.txt
*/

Compilation message (stderr)

Main.cpp: In member function 'int segtree_small::qu1(int, int, int, int, int)':
Main.cpp:295:82: error: 'val' was not declared in this scope
  295 |     else if(constr < l || r < mid+1) return qu1(l, r, constl, mid, (idx<<1) + 1, val);
      |                                                                                  ^~~
Main.cpp: In member function 'int segtree_small::qu2(int, int, int, int, int)':
Main.cpp:302:82: error: 'val' was not declared in this scope
  302 |     else if(constr < l || r < mid+1) return qu2(l, r, constl, mid, (idx<<1) + 1, val);
      |                                                                                  ^~~