//#pragma GCC optimize("Ofast,O2,O3,unroll-loops")
//#pragma GCC target("avx2")
#include <bits/stdc++.h>
using namespace std;
void debug_out() { cerr << endl; }
template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
cerr << "[" << H << "]";
debug_out(T...);
}
#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif
#define SZ(s) ((int)s.size())
#define all(x) (x).begin(), (x).end()
#define lla(x) (x).rbegin(), (x).rend()
#define bpc(x) __builtin_popcount(x)
#define bpcll(x) __builtin_popcountll(x)
#define MP make_pair
clock_t startTime;
double getCurrentTime() {
return (double) (clock() - startTime) / CLOCKS_PER_SEC;
}
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
typedef long long ll;
const int MOD = 1e9 + 7;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 1e5 + 3e2;
const int M = 5555;
int n;
vector<int> lf, rg;
vector<pair<int, int>> queries;
void Subtask_4(){
vector<vector<int>> pl(n, vector<int>(20, 0));
for (int i = 0; i < n; i++){
pl[i][0] = lf[i];
for (int j = 1; j < 20; j++){
pl[i][j] = pl[pl[i][j - 1]][j - 1];
}
}
vector<vector<int>> pr(n, vector<int>(20, 0));
for (int i = n - 1; i >= 0; i--){
pr[i][0] = rg[i];
for (int j = 1; j < 20; j++){
pr[i][j] = pr[pr[i][j - 1]][j - 1];
}
}
function<int(int, int)> get_dist = [&](int x, int y){
if (x == y) return 0;
int ret = 0;
if (x < y) {
if (pr[x].back() < y) return -1;
for (int i = (int)pr[x].size() - 1; i >= 0; i--) {
if (pr[x][i] >= y) continue;
x = pr[x][i];
ret += 1 << i;
}
} else {
if (pl[x].back() > y) return -1;
for (int i = (int)pl[x].size() - 1; i >= 0; i--) {
if (pl[x][i] <= y) continue;
x = pl[x][i];
ret += 1 << i;
}
}
return ret + 1;
};
for (auto qu : queries){
cout << get_dist(qu.first, qu.second) << endl;
}
exit(0);
}
struct SegTree{
int size;
vector<int> tree;
void init(int sz){
size = sz;
tree.assign(4 * sz + 2, INF);
}
void update(int v, int tl, int tr, int pos, int val){
if (tl == tr){
tree[v] = min(tree[v], val);
return;
}
int tm = (tl + tr) >> 1;
if (pos <= tm){
update(v << 1, tl, tm, pos, val);
} else {
update(v << 1 | 1, tm + 1, tr, pos, val);
}
tree[v] = min(tree[v << 1], tree[v << 1 | 1]);
}
void update(int pos, int val){
update(1, 0, size - 1, pos, val);
}
int get(int v, int tl, int tr, int l, int r){
if (l <= tl && tr <= r) return tree[v];
if (tl > r || tr < l) return INF;
int tm = (tl + tr) >> 1;
return min(get(v << 1, tl, tm, l, r), get(v << 1 | 1, tm + 1, tr, l, r));
}
int get(int l, int r){
return get(1, 0, size - 1, l, r);
}
};
int get_dist(int foo, int hoo){
queue<int> q;
set<int> s;
vector<int> d(n, -1);
for (int i = 0; i < n; i++) s.insert(i);
q.push(foo);
s.erase(foo);
d[foo] = 0;
while (!q.empty()){
int x = q.front();
q.pop();
while (!s.empty()){
auto it = s.lower_bound(lf[x]);
if (it != s.end() && *it <= rg[x]){
int y = *it;
q.push(y);
s.erase(y);
d[y] = d[x] + 1;
} else {
break;
}
}
}
return d[hoo];
}
void solve(int TC) {
int k, trips;
cin >> n >> k >> trips;
vector<vector<int>> open_l(n), close_l(n);
vector<vector<int>> open_r(n), close_r(n);
while (trips--){
int a, b;
cin >> a >> b;
--a, --b;
if (a < b){
open_r[a].push_back(b);
close_r[min(a + k, b) - 1].push_back(b);
} else {
open_l[a].push_back(b);
close_l[max(a - k, b) + 1].push_back(b);
}
}
lf.assign(n, 0);
rg.assign(n, 0);
iota(all(lf), 0);
iota(all(rg), 0);
multiset<int> ms;
for (int i = 0; i < n; i++){
for (int r : open_r[i]) ms.insert(r);
if (!ms.empty()) rg[i] = *ms.rbegin();
for (int r : close_r[i]) ms.erase(ms.find(r));
}
ms.clear();
for (int i = n - 1; i >= 0; i--){
for (int l : open_l[i]) ms.insert(l);
if (!ms.empty()) lf[i] = *ms.begin();
for (int l : close_l[i]) ms.erase(ms.find(l));
}
int q;
cin >> q;
while (q--){
int s, t;
cin >> s >> t;
--s, --t;
queries.emplace_back(s, t);
}
if (k == n - 1) Subtask_4();
for (auto qu : queries){
int s = qu.first, t = qu.second;
cout << get_dist(s, t) << endl;
}
}
int main() {
startTime = clock();
ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#ifdef dddxxz
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
int TC = 1;
// cin >> TC;
for (int test = 1; test <= TC; test++) {
//debug(test);
//cout << "Case #" << test << ": ";
solve(test);
}
#ifdef dddxxz
cerr << endl << "Time: " << int(getCurrentTime() * 1000) << " ms" << endl;
#endif
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
340 KB |
Output is correct |
2 |
Correct |
15 ms |
324 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
12 ms |
340 KB |
Output is correct |
5 |
Correct |
14 ms |
340 KB |
Output is correct |
6 |
Correct |
1 ms |
340 KB |
Output is correct |
7 |
Correct |
13 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
1 ms |
340 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
14 ms |
324 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
340 KB |
Output is correct |
2 |
Correct |
15 ms |
324 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
12 ms |
340 KB |
Output is correct |
5 |
Correct |
14 ms |
340 KB |
Output is correct |
6 |
Correct |
1 ms |
340 KB |
Output is correct |
7 |
Correct |
13 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
1 ms |
340 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
14 ms |
324 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
690 ms |
784 KB |
Output is correct |
14 |
Correct |
688 ms |
756 KB |
Output is correct |
15 |
Correct |
1 ms |
724 KB |
Output is correct |
16 |
Correct |
536 ms |
772 KB |
Output is correct |
17 |
Correct |
574 ms |
724 KB |
Output is correct |
18 |
Correct |
4 ms |
1108 KB |
Output is correct |
19 |
Correct |
585 ms |
724 KB |
Output is correct |
20 |
Correct |
607 ms |
724 KB |
Output is correct |
21 |
Correct |
2 ms |
724 KB |
Output is correct |
22 |
Correct |
6 ms |
1108 KB |
Output is correct |
23 |
Correct |
515 ms |
760 KB |
Output is correct |
24 |
Correct |
4 ms |
1108 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
76 ms |
21536 KB |
Output is correct |
2 |
Correct |
73 ms |
21396 KB |
Output is correct |
3 |
Correct |
85 ms |
22748 KB |
Output is correct |
4 |
Correct |
73 ms |
21092 KB |
Output is correct |
5 |
Correct |
186 ms |
25036 KB |
Output is correct |
6 |
Correct |
152 ms |
30412 KB |
Output is correct |
7 |
Correct |
134 ms |
42984 KB |
Output is correct |
8 |
Correct |
111 ms |
21104 KB |
Output is correct |
9 |
Correct |
99 ms |
39688 KB |
Output is correct |
10 |
Correct |
166 ms |
25944 KB |
Output is correct |
11 |
Correct |
146 ms |
44288 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
153 ms |
41124 KB |
Output is correct |
2 |
Correct |
235 ms |
44536 KB |
Output is correct |
3 |
Correct |
173 ms |
42476 KB |
Output is correct |
4 |
Correct |
201 ms |
44252 KB |
Output is correct |
5 |
Correct |
242 ms |
44108 KB |
Output is correct |
6 |
Correct |
257 ms |
44504 KB |
Output is correct |
7 |
Correct |
219 ms |
45388 KB |
Output is correct |
8 |
Correct |
232 ms |
45320 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
2057 ms |
23904 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
340 KB |
Output is correct |
2 |
Correct |
15 ms |
324 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
12 ms |
340 KB |
Output is correct |
5 |
Correct |
14 ms |
340 KB |
Output is correct |
6 |
Correct |
1 ms |
340 KB |
Output is correct |
7 |
Correct |
13 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
1 ms |
340 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
14 ms |
324 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
690 ms |
784 KB |
Output is correct |
14 |
Correct |
688 ms |
756 KB |
Output is correct |
15 |
Correct |
1 ms |
724 KB |
Output is correct |
16 |
Correct |
536 ms |
772 KB |
Output is correct |
17 |
Correct |
574 ms |
724 KB |
Output is correct |
18 |
Correct |
4 ms |
1108 KB |
Output is correct |
19 |
Correct |
585 ms |
724 KB |
Output is correct |
20 |
Correct |
607 ms |
724 KB |
Output is correct |
21 |
Correct |
2 ms |
724 KB |
Output is correct |
22 |
Correct |
6 ms |
1108 KB |
Output is correct |
23 |
Correct |
515 ms |
760 KB |
Output is correct |
24 |
Correct |
4 ms |
1108 KB |
Output is correct |
25 |
Correct |
76 ms |
21536 KB |
Output is correct |
26 |
Correct |
73 ms |
21396 KB |
Output is correct |
27 |
Correct |
85 ms |
22748 KB |
Output is correct |
28 |
Correct |
73 ms |
21092 KB |
Output is correct |
29 |
Correct |
186 ms |
25036 KB |
Output is correct |
30 |
Correct |
152 ms |
30412 KB |
Output is correct |
31 |
Correct |
134 ms |
42984 KB |
Output is correct |
32 |
Correct |
111 ms |
21104 KB |
Output is correct |
33 |
Correct |
99 ms |
39688 KB |
Output is correct |
34 |
Correct |
166 ms |
25944 KB |
Output is correct |
35 |
Correct |
146 ms |
44288 KB |
Output is correct |
36 |
Correct |
153 ms |
41124 KB |
Output is correct |
37 |
Correct |
235 ms |
44536 KB |
Output is correct |
38 |
Correct |
173 ms |
42476 KB |
Output is correct |
39 |
Correct |
201 ms |
44252 KB |
Output is correct |
40 |
Correct |
242 ms |
44108 KB |
Output is correct |
41 |
Correct |
257 ms |
44504 KB |
Output is correct |
42 |
Correct |
219 ms |
45388 KB |
Output is correct |
43 |
Correct |
232 ms |
45320 KB |
Output is correct |
44 |
Execution timed out |
2057 ms |
23904 KB |
Time limit exceeded |
45 |
Halted |
0 ms |
0 KB |
- |