이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include "jumps.h"
#include<bits/stdc++.h>
using namespace std;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=2e5+7, LG=20;
int tr[4*LIM], lewo[LIM], prawo[LIM], nxtr[LIM][LG], nxt[LIM][LG], T[LIM], gdzie[LIM], n, N=1;
int cnt(int l, int r) {
if(l>r) return -1;
l+=N; r+=N;
int ans=max(tr[l], tr[r]);
while(l/2!=r/2) {
if(l%2==0) ans=max(ans, tr[l+1]);
if(r%2==1) ans=max(ans, tr[r-1]);
l/=2; r/=2;
}
return ans;
}
int znajdz(int l, int r, int x) {
int po=l-1, ko=r;
while(po<ko) {
int sr=(po+ko)/2;
if(cnt(sr+1, r)<x) ko=sr; else po=sr+1;
}
return cnt(po+1, r);
}
void init(int _n, vector<int>_T) {
n=_n;
while(N<n) N*=2;
rep(i, n) T[i]=_T[i]-1;
rep(i, n) {
tr[N+i]=T[i];
gdzie[T[i]]=i;
}
for(int i=N-1; i; --i) tr[i]=max(tr[2*i], tr[2*i+1]);
vector<int>V;
rep(i, n) {
while(V.size()>0 && T[V.back()]<T[i]) V.pop_back();
if(V.size()) lewo[i]=V.back(); else lewo[i]=i;
V.pb(i);
}
V.clear();
for(int i=n-1; i>=0; --i) {
while(V.size()>0 && T[V.back()]<T[i]) V.pop_back();
if(V.size()) prawo[i]=V.back(); else prawo[i]=i;
V.pb(i);
}
rep(i, n) nxtr[i][0]=nxt[i][0]=prawo[i];
rep(i, n) if(T[lewo[i]]>T[prawo[i]]) nxt[i][0]=lewo[i];
for(int j=1; j<LG; ++j) {
rep(i, n) {
nxt[i][j]=nxt[nxt[i][j-1]][j-1];
nxtr[i][j]=nxtr[nxtr[i][j-1]][j-1];
}
}
}
int minimum_jumps(int a, int b, int c, int d) {
int p=znajdz(a, b, cnt(c, d));
if(p==-1) return -1;
int x=gdzie[p];
if(cnt(x, c-1)>cnt(c, d)) return -1;
if(nxtr[x][0]>=c) return 1;
int ans=1;
for(int i=LG-1; i>=0; --i) if(nxtr[nxt[x][i]][0]<c) {
ans+=1<<i;
x=nxt[x][i];
}
for(int i=LG-1; i>=0; --i) if(nxtr[x][i]<c) {
ans+=1<<i;
x=nxtr[x][i];
}
return ans;
}
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