Submission #922380

#	Time	Username	Problem	Language	Result	Execution time	Memory
922380		pcc	RMQ (NOI17_rmq)	C++14	30 / 100	77 ms	13584 KiB

rmq

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>


const int mxn = 1e5+10;
vector<int> op[mxn];
int N,Q;
tuple<int,int,int> req[mxn];
int arr[mxn];
int segtree[mxn*4];

void build(int now,int l,int r){
	if(l == r){
		segtree[now] = arr[l];
		return;
	}
	int mid = (l+r)>>1;
	build(now*2+1,l,mid);
	build(now*2+2,mid+1,r);
	segtree[now] = min(segtree[now*2+1],segtree[now*2+2]);
}
int getval(int now,int l,int r,int s,int e){
	if(l >=s&&e>=r)return segtree[now];
	int mid = (l+r)>>1;
	if(mid>=e)return getval(now*2+1,l,mid,s,e);
	else if(mid<s)return getval(now*2+2,mid+1,r,s,e);
	else return min(getval(now*2+1,l,mid,s,e),getval(now*2+2,mid+1,r,s,e));
}

int main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>N>>Q;
	for(int i = 0;i<Q;i++){
		int s,e,v;
		cin>>s>>e>>v;
		req[i] = make_tuple(s,e,v);
		v++;
		op[s].push_back(v);
		op[e+1].push_back(-v);
	}
	multiset<int> st;
	st.insert(0);
	for(int i = 0;i<N;i++){
		for(auto &j:op[i]){
			if(j>0)st.insert(j-1);
			else st.erase(st.find(-j-1));
		}
		arr[i] = *st.rbegin();
	}
	build(0,0,N-1);
	bool flag = true;
	for(int i = 0;i<Q;i++){
		int s = get<0>(req[i]),e = get<1>(req[i]),v = get<2>(req[i]);
		if(getval(0,0,N-1,s,e) != v){
			flag = false;
		}
	}
	if(flag)for(int i = 0;i<N;i++)cout<<arr[i]<<' ';
	else for(int i = 0;i<N;i++)cout<<-1<<' ';
	return 0;
}

• Subtask 1: 6.8999999999999995 / 23
• Subtask 2: 13.2 / 44
• Subtask 3: 9.9 / 33