#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;i<sz*2;i++) tree[i].push_back(a[i-sz]);
for (int i=sz-1;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;
}
int query2(int l, int r){
int ret = -1;
for (l+=sz, r+=sz;l<r;l>>=1, r>>=1){
if (l&1){
ret = max(ret, tree[l].back());
l++;
}
if (r&1){
--r;
ret = max(ret, tree[r].back());
}
}
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 mx = tree.query2(C, D+1);
int cur2 = B, cur3 = -1;
for (int j=19;j>=0;j--) if (cur2-(1<<j)+1>=A && max(sp1[cur2][j], cur3)<mx){
cur3 = max(sp1[cur2][j], cur3);
cur2 -= (1<<j);
}
A = cur2+1;
int tmp = tree.query(A, B+1, mx);
if (tmp==-1) return -1;
int cur = INV[tmp], ans = 0;
/*cur2 = C, cur3 = -1;
for (int j=19;j>=0;j--) if (cur2+(1<<j)-1<=D && max(sp2[cur2][j], cur3)<a[cur]){
cur3 = max(sp2[cur2][j], cur3);
cur2 += (1<<j);
}
C = cur2;*/
for (int j=19;j>=0;j--) if (sp3[cur][j]!=-1 && a[sp3[cur][j]]<mx && sp3[cur][j]<C) cur = sp3[cur][j], ans += (1<<j);
for (int j=19;j>=0;j--) if (sp4[cur][j]!=n && a[sp4[cur][j]]<=mx && sp3[cur][j]<=D) cur = sp4[cur][j], ans += (1<<j);
if (cur<C || cur>D) return -1;
return ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
28488 KB |
Output is correct |
2 |
Correct |
17 ms |
28488 KB |
Output is correct |
3 |
Incorrect |
642 ms |
140864 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
28460 KB |
Output is correct |
2 |
Correct |
18 ms |
28488 KB |
Output is correct |
3 |
Correct |
17 ms |
28488 KB |
Output is correct |
4 |
Correct |
17 ms |
28488 KB |
Output is correct |
5 |
Incorrect |
21 ms |
28488 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
28460 KB |
Output is correct |
2 |
Correct |
18 ms |
28488 KB |
Output is correct |
3 |
Correct |
17 ms |
28488 KB |
Output is correct |
4 |
Correct |
17 ms |
28488 KB |
Output is correct |
5 |
Incorrect |
21 ms |
28488 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
28452 KB |
Output is correct |
2 |
Correct |
16 ms |
28488 KB |
Output is correct |
3 |
Correct |
16 ms |
28512 KB |
Output is correct |
4 |
Correct |
16 ms |
28420 KB |
Output is correct |
5 |
Correct |
482 ms |
142212 KB |
Output is correct |
6 |
Correct |
599 ms |
169884 KB |
Output is correct |
7 |
Correct |
301 ms |
100464 KB |
Output is correct |
8 |
Correct |
580 ms |
169928 KB |
Output is correct |
9 |
Correct |
101 ms |
49464 KB |
Output is correct |
10 |
Correct |
595 ms |
169872 KB |
Output is correct |
11 |
Incorrect |
601 ms |
169964 KB |
Output isn't correct |
12 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
28488 KB |
Output is correct |
2 |
Correct |
17 ms |
28488 KB |
Output is correct |
3 |
Correct |
16 ms |
28452 KB |
Output is correct |
4 |
Correct |
597 ms |
92692 KB |
Output is correct |
5 |
Incorrect |
1762 ms |
169964 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
28488 KB |
Output is correct |
2 |
Correct |
17 ms |
28488 KB |
Output is correct |
3 |
Correct |
16 ms |
28452 KB |
Output is correct |
4 |
Correct |
597 ms |
92692 KB |
Output is correct |
5 |
Incorrect |
1762 ms |
169964 KB |
Output isn't correct |
6 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
28488 KB |
Output is correct |
2 |
Correct |
17 ms |
28488 KB |
Output is correct |
3 |
Incorrect |
642 ms |
140864 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |