#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <deque>
#include <map>
#include <set>
#include <complex>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <chrono>
#define ft first
#define sc second
#define pb push_back
#define len(v) (int)v.size()
#define int ll
using namespace std;
typedef long long ll;
typedef long double ld;
int inf = 1e9 + 100;
signed main() {
#ifdef PC
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
#endif
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, k, q;
cin >> n >> k >> q;
vector<int> l(n);
vector<vector<int>> g(n);
for (int i = 0; i < n; i++) {
cin >> l[i];
}
vector<int> pred(n, -1);
vector<int> nxt(n, n);
vector<pair<int, int>> have;
for (int i = 0; i < n; i++) {
while(len(have) > 0 && have.back().ft <= l[i])
have.pop_back();
if(len(have) > 0)
pred[i] = have.back().sc;
have.pb({l[i], i});
}
have.clear();
for (int i = n - 1; i >= 0; i--) {
while(len(have) > 0 && have.back().sc <= l[i])
have.pop_back();
if(len(have) > 0)
nxt[i] = have.back().sc;
have.pb({l[i], i});
}
for (int i = 0; i < n; i++) {
if(i < n - 1)
g[i].pb(i + 1);
int now = i - 1;
while(1) {
if(now < 0)
break;
g[i].pb(now);
if(l[now] >= l[i])
break;
now = pred[now];
}
now = i + 1;
while(1) {
if(now >= n)
break;
g[i].pb(now);
if(l[now] >= l[i])
break;
now = nxt[now];
}
}
vector<vector<int>> dst(n, vector<int> (n, inf));
for (int i = 0; i < n; i++) {
dst[i][i] = 0;
deque<int> q;
q.pb(i);
while(len(q) > 0) {
auto now = q.front();
q.pop_front();
for (auto x : g[now]) {
if(dst[i][x] != inf)
continue;
dst[i][x] = dst[i][now] + 1;
q.pb(x);
}
}
}
for (int i = 0; i < q; i++) {
int a, b;
cin >> a >> b;
a--, b--;
cout << dst[a][b] - 1 << '\n';
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
5 ms |
376 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
42 ms |
8312 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
332 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
332 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
