#include "jumps.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ff first
#define ss second
const int mod = 1e9 + 7;
const int inf = 1e9;
const int logn = 20;
template<typename T>
int len(T &a){return a.size();}
vector<vector<int>> up;
int n;
bool sub1 = 1;
struct Segtree{
vector<int> t;
int n;
void init(int _n){
n = _n;
t.resize(2 * n);
}
int merge(const int &a, const int &b){
return max(a, b);
}
void build(vector<int> &a){
init(len(a));
for(int i = 0; i < n; i ++) t[i + n] = a[i];
for(int i = n - 1; i > 0; i --) t[i] = merge(t[i << 1], t[i << 1 | 1]);
}
int get(int l, int r){
l += n; r += n;
int res = -1;
while(l <= r){
if(l % 2) res = merge(res, t[l ++]);
if(r % 2 == 0) res = merge(res, t[r --]);
l /= 2; r /= 2;
}
return res;
}
} t;
vector<int> h; vector<int> pos;
void init(int N, vector<int> H) {
h = H;
n = N;
pos.resize(n);
for(int i = 0; i < n; i ++) h[i] --;
for(int i = 0; i < n; i ++) pos[h[i]] = i;
vector<int> st;
vector<int> lef(n), rig(n);
for(int i = 0; i < n; i ++){
if(h[i] != i + 1) sub1 = 0;
while(!st.empty() && st.back() <= h[i]) st.pop_back();
if(st.empty()) lef[i] = -1;
else lef[i] = st.back();
st.push_back(h[i]);
}
if(sub1) return;
st.clear();
for(int i = n - 1; i >= 0; i --){
while(!st.empty() && st.back() <= h[i]) st.pop_back();
if(st.empty()) rig[i] = -1;
else rig[i] = st.back();
st.push_back(h[i]);
}
up.assign(logn, vector<int> (n, -1));
for(int i = 0; i < n; i ++){
up[0][h[i]] = max(lef[i], rig[i]);
}
t.build(h);
for(int j = 1; j < logn; j ++){
for(int i = 0; i < n; i ++){
if(up[j - 1][i] == -1) continue;
//cout << (up[j][i]) << endl;
up[j][i] = up[j - 1][up[j - 1][i]];
}
}
}
int minimum_jumps(int A, int B, int C, int D) {
if(sub1) return C - B;
if(t.get(B, C - 1) >= t.get(C, D)){
return -1;
}
int l = A - 1, r = B;
while(r - l > 1){
int m = (l + r) / 2;
if(t.get(m, C - 1) < h[C]){
r = m;
}else l = m;
}
int st = t.get(r, B);
int ans = 0;
for(int j = logn - 1; j >= 0; j --){
if(up[j][st] != -1 && up[j][st] < h[C]){
st = up[j][st];
ans |= 1 << j;
}
}
return ans + 1;
}
Compilation message
hexagon.cpp:1:10: fatal error: jumps.h: No such file or directory
1 | #include "jumps.h"
| ^~~~~~~~~
compilation terminated.
