Submission #500389

#	Time	Username	Problem	Language	Result	Execution time	Memory
500389		MohamedAhmed04	RMQ (NOI17_rmq)	C++14	100 / 100	68 ms	11332 KiB

rmq

#include <bits/stdc++.h>

using namespace std ;

const int MAX = 1e5 + 10 ;

int n , q ;

int L[MAX] , R[MAX] , L2[MAX] , R2[MAX] ;

set<int>s , s2 ;

int ans[MAX] ;

void Exit()
{
	for(int i = 0 ; i < n ; ++i)
		cout<<-1<<" " ;
	exit(0) ;
}

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n>>q ;
	for(int i = 0 ; i < n ; ++i)
		L[i] = R2[i] = -1 , R[i] = L2[i] = 1e9 ;
	while(q--)
	{
		int l , r , x ;
		cin>>l>>r>>x ;
		L[x] = max(L[x] , l) , R[x] = min(R[x] , r) ;
		L2[x] = min(L2[x] , l) , R2[x] = max(R2[x] , r) ;
	}
	for(int i = 0 ; i < n ; ++i)
		s.insert(i) , s2.insert(i) ;
	for(int i = n-1 ; i >= 0 ; --i)
	{
		if(L[i] == -1)
			continue ;
		if(L[i] > R[i])
			Exit() ;
		auto it = s.lower_bound(L[i]) ;
		if(it == s.end() || (*it) > R[i])
			Exit() ;
		ans[*it] = i , s.erase(it) , s2.erase(i) ;
		while(s.size())
		{
			it = s.lower_bound(L2[i]) ;
			if(it == s.end() || (*it) > R2[i])
				break ;
			int x = *s2.rbegin() ;
			if(x < i)
				Exit() ;
			ans[*it] = x , s.erase(it) , s2.erase(x) ;
		}
	}
	while(s.size())
	{
		ans[*s.begin()] = *s2.begin() ;
		s.erase(s.begin()) , s2.erase(s2.begin()) ;
	}
	for(int i = 0 ; i < n ; ++i)
		cout<<ans[i]<<" " ;
	cout<<"\n" ;
	return 0 ;
}		

• Subtask 1: 23 / 23
• Subtask 2: 44 / 44
• Subtask 3: 33 / 33