oj.uz

답안 #408846

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
408846 2021-05-19T17:58:08 Z victoriad Fountain (eJOI20_fountain) C++14
60 / 100
 1500 ms 27636 KB 
#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <utility>
#include <queue>
#include <map>
#include <iomanip>
#include <stack>
#include <fstream>
using namespace std;
 vector<int>v;
 vector<int>d;
vector<vector<int> >up;
int search(int l,vector<int>&ps,int r){
	int low=0,hi=18,mid,re=-1;
	while(low<=hi){
		mid=low+(hi-low)/2;
		if(ps[up[r][mid]]>l){
			low=mid+1;
			re=mid;
		}
		else{
			hi=mid-1;
		}
	}
	if(re==-1)return 0;
	if(ps[up[r][1]]<=l)return up[r][re]+1;
	return search(l,ps,up[r][re]);
}
 void suma(vector<int>&ps,vector<vector<int> >&c,int nodo){
	 if(up[nodo][1]==-1)ps[nodo]=v[nodo];
	 else ps[nodo]=ps[up[nodo][1]]+v[nodo];
	 for(int y:c[nodo]){
		 if(ps[y]==0){
			 suma(ps,c,y);
		 }
	 }
 }
 
int main(){
  ios::sync_with_stdio(false);
   cin.tie(NULL);
    int n,q;
    cin>>n>>q;
	int l,r;
    v.resize(n);
	d.resize(n);
    for(int i=0;i<n;i++){
      cin>>d[i]>>v[i];
    }
	vector<vector<int> >con(n);
	up.resize(n);
	vector<int>a(28,-1);
	for(int i=0;i<n;i++)up[i]=a;
	for(int i=0;i<n;i++)up[i][0]=i;
	int an=-1,u=0;
	for(int i=0;i<n;i++){
		bool b=true;
		int x=i+1;
		if(an!=-1 && d[i]>=u)x=an;
		for(int k=x;k<n;k++){
			if(d[i]<d[k]){
				up[i][1]=k;
				b=false;
				con[k].push_back(i);
				an=k;
				break;
			}
		}
		if(b){
			an=-1;
			up[i][1]=-1;
		}
		u=d[i];
 
	}
	vector<int>ps(n,0);
	for (int i=0;i<n;i++){
		if(up[i][1]==-1){
			suma(ps,con,i);
		}
	}
 
	for(int l=2;l<18;l++){
		for(int i=0;i<n;i++){
			if(up[i][l-1]!=-1)up[i][l]=up[up[i][l-1]][l-1];
		}
	}
 
	for(int i=0;i<q;i++){
		cin>>r>>l;
		r--;
		if(l<=v[r])cout<<r+1<<"\n";
		else if(ps[r]-l<0)cout<<0<<"\n";
		else cout<<search(ps[r]-l,ps,r)<<"\n";
	}
	
	
  return 0;
}

Subtask #1
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 2 ms 460 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 268 ms 25900 KB Output is correct
2 Correct 272 ms 24060 KB Output is correct

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 2 ms 460 KB Output is correct
5 Correct 2 ms 460 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 460 KB Output is correct
8 Correct 268 ms 25900 KB Output is correct
9 Correct 272 ms 24060 KB Output is correct
10 Correct 2 ms 460 KB Output is correct
11 Correct 166 ms 12620 KB Output is correct
12 Correct 401 ms 27636 KB Output is correct
13 Correct 465 ms 22724 KB Output is correct
14 Correct 176 ms 21812 KB Output is correct
15 Execution timed out 1579 ms 18728 KB Time limit exceeded