#include "jumps.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
vector<int> sp1[200200], sp2[200200], sp3[200200], sp4[200200], a;
int n, l[200200], r[200200], INV[200200];
struct MST{
vector<int> tree[400400];
int sz;
void init(int n){
sz = n;
for (int i=sz+1;i<sz*2;i++) tree[i].push_back(a[i-sz]);
for (int i=sz;i;i--){
tree[i].resize(tree[i<<1].size()+tree[i<<1|1].size());
merge(tree[i<<1].begin(), tree[i<<1].end(), tree[i<<1|1].begin(), tree[i<<1|1].end(), tree[i].begin());
}
}
int query(int l, int r, int x){
int ret = -1;
for (l+=sz, r+=sz;l<r;l>>=1, r>>=1){
if (l&1){
auto iter = lower_bound(tree[l].begin(), tree[l].end(), x);
if (iter!=tree[l].begin()) ret = max(ret, *(--iter));
l++;
}
if (r&1){
--r;
auto iter = lower_bound(tree[r].begin(), tree[r].end(), x);
if (iter!=tree[r].begin()) ret = max(ret, *(--iter));
}
}
return ret;
}
}tree;
int geth(int x){
if (x<0) return -1e9;
if (x>=n) return -1e9;
return a[x];
}
void init(int N, std::vector<int> H) {
n = N, a = H;
for (int i=0;i<n;i++){
INV[H[i]] = i;
sp1[i].push_back(H[i]);
sp2[i].push_back(H[i]);
}
for (int j=1;j<20;j++){
for (int i=0;i<n;i++){
if (i-(1<<j)+1<0) sp1[i].push_back(-1);
else sp1[i].push_back(max(sp1[i][j-1], sp1[i-(1<<(j-1))][j-1]));
if (i+(1<<j)-1>=n) sp2[i].push_back(-1);
else sp2[i].push_back(max(sp2[i][j-1], sp2[i+(1<<(j-1))][j-1]));
}
}
for (int i=0;i<n;i++){
int cur = i-1, cur2 = -1e9;
for (int j=19;j>=0;j--) if (cur!=-1 && sp1[cur][j]!=-1 && max(cur2, sp1[cur][j])<H[i]){
cur2 = max(cur2, sp1[cur][j]);
cur -= (1<<j);
}
l[i] = cur; cur = i+1, cur2 = -1e9;
for (int j=19;j>=0;j--) if (cur!=n && sp2[cur][j]!=-1 && sp2[cur][j]<H[i]){
cur2 = max(cur2, sp1[cur][j]);
cur += (1<<j);
}
r[i] = cur;
if (geth(l[i])>=geth(r[i])) sp3[i].push_back(l[i]);
else sp3[i].push_back(r[i]);
sp4[i].push_back(r[i]);
//printf("%d %d\n", l[i], r[i]);
}
for (int j=1;j<20;j++){
for (int i=0;i<n;i++){
if (sp3[i][j-1]==-1) sp3[i].push_back(-1);
else sp3[i].push_back(sp3[sp3[i][j-1]][j-1]);
if (sp4[i][j-1]==n) sp4[i].push_back(n);
else sp4[i].push_back(sp4[sp4[i][j-1]][j-1]);
}
}
tree.init(n);
}
int minimum_jumps(int A, int B, int C, int D) {
int tmp = tree.query(A, B+1, a[C]);
if (tmp==-1) return -1;
int cur = INV[tmp], ans = 0;
for (int j=19;j>=0;j--) if (sp3[cur][j]!=-1 && a[sp3[cur][j]]<a[C]) cur = sp3[cur][j], ans += (1<<j);
for (int j=19;j>=0;j--) if (sp4[cur][j]!=n && a[sp4[cur][j]]<=a[C]) cur = sp4[cur][j], ans += (1<<j);
if (cur!=C) return -1;
return ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
15 ms |
28488 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
16 ms |
28488 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
16 ms |
28488 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
18 ms |
28480 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
15 ms |
28496 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
15 ms |
28496 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
15 ms |
28488 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
