oj.uz

Submission #914057

# Submission time Handle Problem Language Result Execution time Memory
914057 2024-01-21T01:16:15 Z cig32 Railway Trip 2 (JOI22_ho_t4) C++17
44 / 100
 837 ms 74476 KB 
#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); }
};
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;
  if(n <= 300 && m <= 300) {
    int dist[n+1][n+1];
  for(int i=1; i<=n; i++) {
    for(int j=1; j<=n; j++) {
      dist[i][j] = (i == j ? 0 : 1e9);
    }
  }
  for(int i=1; i<=m; i++) {
    int a, b;
    cin >> a >> b;
    if(a < b) {
      for(int j=a; j<a+k; j++) {
        for(int l=j+1; l<=b; l++) {
          dist[j][l] = 1;
        }
      }
    }
    else {
      for(int j=a; j>a-k; j--) {
        for(int l=j-1; l>=b; l--) {
          dist[j][l] = 1;
        }
      }
    }
  }
  for(int l=1; l<=n; l++) {
    for(int i=1; i<=n; i++) {
      for(int j=1; j<=n; j++) {
        dist[i][j] = min(dist[i][j], dist[i][l]+dist[l][j]);
      }
    }
  }
  int q;
  cin >> q;
  while(q--) {
    int s, t;
    cin >> s >> t;
    cout << (dist[s][t] >= 1e7 ? -1 : dist[s][t]) << '\n';
  }
    return;
  }
  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;
  }
  for(int i=1; i<18; i++) {
    for(int j=1; j<=n; j++) {
      pair<int, int> bruh = st[i-1][j];
      int id1 = bruh.first;
      int id2 = bruh.second;
      int l = min(st[i-1][id1].first, st[i-1][id2].first);
      int r = max(st[i-1][id1].second, st[i-1][id2].second);
      st[i][j] = {l, r};
    }
  }
  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 getl = P.query_min(min(st[i][l].first, st[i][r].first), max(st[i][l].second, st[i][r].second));
      int getr = M.query_max(min(st[i][l].first, st[i][r].first), max(st[i][l].second, st[i][r].second));
      if((s < t && getr < t) || (s > t && getl > t)) {
        S += (1 << i);
        int m1 = min(st[i][l].first, st[i][r].first);
        int m2 = max(st[i][l].second, st[i][r].second);
        l = m1;
        r = m2;
      }
    }
    S++;
    int m1 = min(st[0][l].first, st[0][r].first);
    int m2 = max(st[0][l].second, st[0][r].second);
    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';
  }
}
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
*/

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 2908 KB Output is correct
2 Correct 24 ms 2908 KB Output is correct
3 Correct 24 ms 1112 KB Output is correct
4 Correct 22 ms 1008 KB Output is correct
5 Correct 22 ms 2544 KB Output is correct
6 Correct 25 ms 1116 KB Output is correct
7 Correct 21 ms 2652 KB Output is correct
8 Correct 23 ms 2396 KB Output is correct
9 Correct 23 ms 1116 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 26 ms 2396 KB Output is correct
12 Correct 22 ms 1116 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 2908 KB Output is correct
2 Correct 24 ms 2908 KB Output is correct
3 Correct 24 ms 1112 KB Output is correct
4 Correct 22 ms 1008 KB Output is correct
5 Correct 22 ms 2544 KB Output is correct
6 Correct 25 ms 1116 KB Output is correct
7 Correct 21 ms 2652 KB Output is correct
8 Correct 23 ms 2396 KB Output is correct
9 Correct 23 ms 1116 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 26 ms 2396 KB Output is correct
12 Correct 22 ms 1116 KB Output is correct
13 Incorrect 11 ms 1884 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 101 ms 69328 KB Output is correct
2 Correct 110 ms 68808 KB Output is correct
3 Correct 117 ms 69324 KB Output is correct
4 Correct 110 ms 68364 KB Output is correct
5 Correct 216 ms 73664 KB Output is correct
6 Correct 151 ms 73664 KB Output is correct
7 Correct 208 ms 73300 KB Output is correct
8 Correct 157 ms 68940 KB Output is correct
9 Correct 156 ms 69676 KB Output is correct
10 Correct 165 ms 71736 KB Output is correct
11 Correct 162 ms 72084 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 397 ms 69864 KB Output is correct
2 Correct 504 ms 72936 KB Output is correct
3 Correct 713 ms 70708 KB Output is correct
4 Correct 211 ms 72920 KB Output is correct
5 Correct 251 ms 72096 KB Output is correct
6 Correct 272 ms 74040 KB Output is correct
7 Correct 517 ms 74264 KB Output is correct
8 Correct 652 ms 74440 KB Output is correct

Subtask #5
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 481 ms 72868 KB Output is correct
2 Correct 837 ms 71912 KB Output is correct
3 Correct 791 ms 70828 KB Output is correct
4 Correct 748 ms 68528 KB Output is correct
5 Correct 549 ms 68288 KB Output is correct
6 Correct 491 ms 68180 KB Output is correct
7 Correct 152 ms 70328 KB Output is correct
8 Correct 26 ms 1116 KB Output is correct
9 Correct 5 ms 1884 KB Output is correct
10 Correct 223 ms 72132 KB Output is correct
11 Correct 235 ms 74476 KB Output is correct
12 Correct 235 ms 71860 KB Output is correct
13 Correct 234 ms 73028 KB Output is correct
14 Correct 24 ms 2908 KB Output is correct
15 Incorrect 10 ms 2136 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 2908 KB Output is correct
2 Correct 24 ms 2908 KB Output is correct
3 Correct 24 ms 1112 KB Output is correct
4 Correct 22 ms 1008 KB Output is correct
5 Correct 22 ms 2544 KB Output is correct
6 Correct 25 ms 1116 KB Output is correct
7 Correct 21 ms 2652 KB Output is correct
8 Correct 23 ms 2396 KB Output is correct
9 Correct 23 ms 1116 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 26 ms 2396 KB Output is correct
12 Correct 22 ms 1116 KB Output is correct
13 Incorrect 11 ms 1884 KB Output isn't correct
14 Halted 0 ms 0 KB -