Submission #340830

#	Time	Username	Problem	Language	Result	Execution time	Memory
340830		katearima	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	64 / 100	3055 ms	75768 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;
const int N=1e6+5;
int n,m, tree[4*N], a[N];
struct book{
	int x, mood, ind;
};
struct books {
	int x, y;
	int sum;
	bool operator<(books const& other) {
        return y < other.y;
    }
};
int ans[N];
vector<book> q[N];
vector<books> v;
stack<int> st;
void update(int i, int x, int y, int k, int val){
	if(y<k || x>k) return; 
	if(k>=x && k<=y) {
		tree[i]=max(tree[i], val);
		if(x==y) return;
	}
	int mid=(x+y)/2;
	update(2*i+1, x,  mid, k, val);
	update(2*i+2, mid+1, y, k,val);
}
int getmax(int i, int x, int y, int l , int r){
	if(r<x || l>y) return 0;
	if(x>=l && y<=r) return tree[i];
	int mid=(x+y)/2;
	if(x!=y){
		return max(getmax(2*i+1,x, mid , l, r), getmax(2*i+2, mid+1, y, l, r));
	}
	return 0;
	
}
main(){

	cin>>n>>m;
	for(int i=0; i<n; i++){
		cin>>a[i];
	}
	for(int i=0; i<m; i++){
		int l, r, k;
		cin>>l>>r>>k;
		l--; r--;
		q[r].push_back({l,k,i});
	}
	
	for(int i=n-1; i>=0; i--){
		while(st.size()!=0 && a[st.top()]<a[i]){
			v.push_back({i, st.top(), a[i]+a[st.top()] });
			st.pop();
		}
    	st.push(i);
	}
	v.push_back({n+1, n+1, n+1});
	sort(v.begin(), v.end());
 
	for(int j=0; j<min(n,v[0].y); j++){
			
		
		for(auto k: q[j]){
			int mx=getmax(0,0,n-1,k.x, j);
			//cout<<i<<" "<<k.x<<" "<<k.mood<<" "<<k.ind<<" "<<mx<<endl;
			if(mx<=k.mood) ans[k.ind]=1;
			else ans[k.ind]=0;
		}
	}
 
	for(int i=0; i<v.size()-1; i++){
		update(0,0,n-1,v[i].x, v[i].sum);
		for(int j=v[i].y; j<min(n,v[i+1].y); j++){
			
		
		for(auto k: q[j]){
			int mx=getmax(0,0,n-1,k.x, j);
			//cout<<i<<" "<<k.x<<" "<<k.mood<<" "<<k.ind<<" "<<mx<<endl;
			if(mx<=k.mood) ans[k.ind]=1;
			else ans[k.ind]=0;
		}
		}
	}
	for(int i=0; i<m; i++){
		cout<<ans[i]<<endl;
	}
	
}

Compilation message (stderr)

sortbooks.cpp:39:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   39 | main(){
      |      ^
sortbooks.cpp: In function 'int main()':
sortbooks.cpp:73:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<books>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |  for(int i=0; i<v.size()-1; i++){
      |               ~^~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 9 / 9
• Subtask 3: 0 / 13
• Subtask 4: 17 / 17
• Subtask 5: 30 / 30
• Subtask 6: 0 / 23