Submission #321888

#	Time	Username	Problem	Language	Result	Execution time	Memory
321888		errorgorn	Growing Trees (BOI11_grow)	C++17	100 / 100	638 ms	12472 KiB

grow

//雪花飄飄北風嘯嘯
//天地一片蒼茫

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl

#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()

#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
//change less to less_equal for non distinct pbds, but erase will bug

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

int n,q;
int arr[100005];

struct node{
	int s,e,m;
	int val=0;
	node *l,*r;
	
	node (int _s,int _e){
		s=_s,e=_e,m=s+e>>1;
		
		if (s!=e){
			l=new node(s,m);
			r=new node(m+1,e);
		}
	}
	
	void update(int i,int j,int k){
		if (s==i && e==j) val+=k;
		else if (j<=m) l->update(i,j,k);
		else if (m<i) r->update(i,j,k);
		else l->update(i,m,k),r->update(m+1,j,k);
	}
	
	int query(int i){
		if (s==e) return val;
		else if (i<=m) return val+l->query(i);
		else return val+r->query(i);
	}
} *root=new node(0,100005);

int find(int val){
	int lo=-1,hi=n,mi;
	while (hi-lo>1){
		mi=lo+hi>>1;
		
		if (root->query(mi)<=val) lo=mi;
		else hi=mi;
	}
	return lo;
}

int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin.exceptions(ios::badbit | ios::failbit);
	
	cin>>n>>q;
	rep(x,0,n) cin>>arr[x];
	
	sort(arr,arr+n);
	rep(x,0,n) root->update(x,x,arr[x]);
	
	char c;
	int a,b;
	while (q--){
		cin>>c;
		if (c=='F'){
			cin>>a>>b;
			int l=find(b-1)+1;
			if (l+a>=n){
				if (l<=n-1) root->update(l,n-1,1);
			}
			else{
				int r=l+a-1;
				int l2=find(root->query(r)-1)+1;
				int r2=find(root->query(r));
				
				if (l!=l2) root->update(l,l2-1,1);
				//cerr<<l<<" "<<r<<endl;
				//cerr<<l2<<" "<<r2<<endl;
				//cerr<<l2+r2-r<<" "<<r2<<endl;
				root->update(l2+r2-r,r2,1);
			}
			
			//rep(x,0,n) cout<<root->query(x)<<" "; cout<<endl;
		}
		else{
			cin>>a>>b;
			
			cout<<find(b)-find(a-1)<<endl;
		}
	}
	
}

Compilation message (stderr)

grow.cpp: In constructor 'node::node(int, int)':
grow.cpp:37:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   37 |   s=_s,e=_e,m=s+e>>1;
      |               ~^~
grow.cpp: In function 'int find(int)':
grow.cpp:62:8: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   62 |   mi=lo+hi>>1;
      |      ~~^~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10