Submission #981120

#	Time	Username	Problem	Language	Result	Execution time	Memory
981120		shadow_sami	Rainforest Jumps (APIO21_jumps)	C++17	100 / 100	815 ms	53128 KiB

jumps

#include<bits/stdc++.h>
#include "jumps.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef int ll;
typedef vector<ll> vi;
typedef vector<vector<ll>> vvi;
typedef pair<ll,ll> pi;
typedef map<ll,ll> mi;
typedef long double ld;
typedef vector<ld> vd;
typedef vector<vector<ld>> vvd;
typedef pair<ld,ld> pd;
#define ff first
#define ss second
#define srt(a) sort(a.begin(),a.end());
#define fip(k, n) for (ll i = k; i < n; i++)
#define fjp(k, n) for (ll j = k; j < n; j++)
#define fin(k, n) for (ll i = k; i >= n; i--)
#define fjn(k, n) for (ll j = k; j >= n; j--)
#define fp(k, n, m) for (ll k = n; k < m; k++)
#define fn(k, n, m) for (ll k = n; k >= m; k--)
#define ordered_set tree<pi, null_type,less< pi >, rb_tree_tag,tree_order_statistics_node_update>
#define totalOne(n) __builtin_popcount(n)
#define backZero(n) __builtin_ctzll(n)
#define frontZero(n) __builtin_clzll(n)
#define fx(k) for ( auto x : k )
#define test ll t;cin >> t;while (t--)
#define nli "\n"
 
// ==========================(debug)============================================================================================== //
 
#ifndef ONLINE_JUDGE
#define debug(x) cerr << #x <<" "; _printn(x); cerr << nli;
#else
#define debug(x)
#endif
 
// void _printn(ll x){ cerr<<x<<" "; }
void _printn(int x){ cerr<<x<<" "; }
void _printn(ld x){ cerr<<x<<" "; }
void _printn(double x){ cerr<<x<<" "; }
void _printn(string x){ cerr<<x<<" "; }
void _printn(char x){ cerr<<x<<" "; }
void _printn(bool x){ cerr<<x<<" "; }
template<class T,class V>void _printn(pair<T,V> vv);
template<class T> void _printn(vector<T> vv);
template<class T> void _printn(set<T> vv);
template<class T,class V> void _printn(map<T,V> vv);
template<class T> void _printn(multiset<T> vv);
template<class T,class V>void _printn(pair<T,V> vv){ cerr<<"( ";_printn(vv.ff);cerr<<",";_printn(vv.ss);cerr<<")";}
template<class T> void _printn(vector<T> vv){ cerr<<"[ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"]"; };
template<class T> void _printn(set<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T> void _printn(multiset<T> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
template<class T,class V> void _printn(map<T,V> vv){ cerr<<"{ "; for(auto xx:vv){ _printn(xx);cerr<<" "; } cerr<<"}"; };
 
// ==========================(debug)============================================================================================== //
 
ll n,m,tp,tp2,res,cnt,sum,tptp,ans;
const ll mx = 2e5+5;
const ll mod = 1e9+7;
 
bool f = false;
ll a[mx];
stack<ll> sck;
ll lefte[mx],righte[mx];
ll low[mx][20];
ll high[mx][20];
ll to[mx][20];
ll id[mx];
 
// void deb(){
// 	priority_queue<pi,vector<pi>,greater<pi>> k2 = pq;
// 	while(k2.size()){
// 		cout<<k2.top().ff<<" "<<k2.top().ss<<nli;
// 		k2.pop();
// 	}
// 	return ;
// }
 
void emptify(){
	while(sck.size())
		sck.pop();
	return;
}
 
void init(ll aa,vi v){
	n = aa;
	fip(0,n){
		a[i] = v[i],lefte[i] = righte[i] = -1;;
		id[a[i]] = i;
	}
	emptify();
	fip(0,n){
		while(sck.size() && a[i] > a[sck.top()])
			sck.pop();
		if(sck.size())
			lefte[i] = sck.top();
		else
			lefte[i] = i;
		sck.push(i);
	}
	emptify();
	fin(n-1,0){
		while(sck.size() && a[i] > a[sck.top()])
			sck.pop();
		if(sck.size())
			righte[i] = sck.top();
		else
			righte[i] = i;
		sck.push(i);
	}
	fip(0,n){
		to[i][0] = lefte[i];
		if(a[lefte[i]] > a[righte[i]]){
			high[i][0] = lefte[i];
			low[i][0] = righte[i];
		}else{
			high[i][0] = righte[i];
			low[i][0] = lefte[i];
		}
	}		
	fjp(1,20){
		fip(0,n){			
			to[i][j] = to[to[i][j-1]][j-1];			
			high[i][j] = high[high[i][j-1]][j-1];			
			low[i][j] = low[low[i][j-1]][j-1];
		}
	}
	return;
}
 
// ll calc(ll sr,ll de,ll na){
// 	if(sr==de)
// 		return na;
// 	fin(19,0){
// 		if(a[high[sr][i]] < a[de]){
// 			sr = high[sr][i];
// 			na |= (1<<i);
// 		}
// 	}
// 	if(a[high[sr][0]]==a[de])
// 		return na + 1;
// 	if(a[low[sr][0]]==a[de])
// 		return na + 1;
// 	fin(19,0){
// 		if(a[low[sr][i]] < a[de]){
// 			sr = low[sr][i];
// 			na |= (1<<i);
// 		}
// 	}
// 	if(a[low[sr][0]]==a[de])
// 		return na + 1;
// 	return -1;
// }

ll get(ll aa,ll b,ll x){
	if(a[b] > x)
		return -1;
	fjn(19,0)
		if(to[b][j]>=aa && a[to[b][j]]<x){			
			b = to[b][j];
		}
	return b;
}
 
ll minimum_jumps(ll b,ll c,ll d,ll e){
	ll nas = 0;
	tp = get(d,e,1e9);
	tp2 = get(b,c,a[tp]);	
	if(tp2==-1)
		return -1;
	if(tp2==tp-1)
		return 1;	
	tptp = get(c+1,d-1,1e9);	

	if(a[tptp]>a[tp])
		return -1;
	if(a[tptp]<a[tp2])
		return 1;
	fin(19,0){
		if(a[high[tp2][i]] <= a[tptp]){
			tp2 = high[tp2][i];
			nas += (1<<i);
		}
	}
	if(a[tp2]==a[tptp])
		return nas+1;
	if(a[high[tp2][0]]<a[tp])
		return nas+2;
	fin(19,0){
		if(a[low[tp2][i]] <= a[tptp]){
			tp2 = low[tp2][i];
			nas += (1<<i);
		}
	}
	return nas+1;
}
 
// int main(){
//     ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//     #ifndef ONLINE_JUDGE
//         freopen("input1.txt", "r", stdin);
//         freopen("output1.txt", "w", stdout);
//         freopen("error1.txt", "w", stderr);
//     #endif // ONLINE_JUDGE
 
//         ll aa;
//         cin>>aa;
//         vi bb(aa);
//         ll q;
//         cin>>q;
//         fip(0,aa)
//         	cin>>bb[i];
//         init(aa,bb);
        
//         while(q--){
//         	ll b,c,d,e;
//         	cin>>b>>c>>d>>e;
//         	cout<<minimum_jumps(b,c,d,e)<<nli;
//         }
        
//     cerr << "Time elapsed: " << setprecision(6) << 1000.0 * clock() / CLOCKS_PER_SEC << "ms\n";
//     return 0;
// }

• Subtask 1: 4 / 4
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 23 / 23
• Subtask 6: 21 / 21
• Subtask 7: 19 / 19