Submission #735836

#	Time	Username	Problem	Language	Result	Execution time	Memory
735836		shadow_sami	Rainforest Jumps (APIO21_jumps)	C++17	33 / 100	4045 ms	9812 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];
priority_queue<pi,vector<pi>,greater<pi>> pq;
bool vis[mx];
ll dp[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;;
	emptify();
	fip(0,n){
		while(sck.size() && a[i] > a[sck.top()])
			sck.pop();
		if(sck.size())
			lefte[i] = sck.top();
		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();
		sck.push(i);
	}
	fip(0,aa+2)
		vis[i] = 0;
	return;
}

ll minimum_jumps(ll b,ll c,ll d,ll e){
	ll na;
	fip(0,n+2)
		dp[i] = 1e9,vis[i] = 0;
	fip(b,c+1){
		if(lefte[i] != -1){
			pq.push({1,lefte[i]});
		}
		if(righte[i] != -1){
			pq.push({1,righte[i]});
		}
	}
	// cout<<nli;
	// deb();
	// cout<<nli;
	while(pq.size()){
		auto it = pq.top();
		// debug(it);
		pq.pop();
		if(vis[it.ss])
			continue;
		vis[it.ss] = 1;
		dp[it.ss] = min(dp[it.ss],it.ff);
		// debug(dp[it.ss]);
		if(lefte[it.ss] != -1){
			if(!vis[lefte[it.ss]])
				pq.push({dp[it.ss]+1,lefte[it.ss]});
		}
		if(righte[it.ss] != -1){
			if(!vis[righte[it.ss]])
				pq.push({dp[it.ss]+1,righte[it.ss]});
		}
	}
	// cerr<<nli;
	na = 1e9;
	fip(d,e+1)
		na = min(na,dp[i]);
	if(na == 1e9)
		na = -1;
	return na;
}

// 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: 0 / 4
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 0 / 23
• Subtask 6: 0 / 21
• Subtask 7: 0 / 19