Submission #1008981

#	Time	Username	Problem	Language	Result	Execution time	Memory
1008981		m5588ohammed	Fountain (eJOI20_fountain)	C++14	100 / 100	423 ms	45596 KiB

fountain

/******************************************************************************

Welcome to GDB Online.
GDB online is an online compiler and debugger tool for C, C++, Python, Java, PHP, Ruby, Perl,
C#, OCaml, VB, Swift, Pascal, Fortran, Haskell, Objective-C, Assembly, HTML, CSS, JS, SQLite, Prolog.
Code, Compile, Run and Debug online from anywhere in world.

*******************************************************************************/
#include <bits/stdc++.h>
using namespace std;
#define int long long
int rad[500001],cap[500001];
array <int,2> sum[500001][21];
vector <int> v;
signed main()
{
    int n,q;
    cin>>n>>q;
    for(int i=1;i<=n;i++) cin>>rad[i]>>cap[i];
    for(int i=n;i>=1;i--){
        while(v.size()!=0&&rad[v.back()]<=rad[i]) v.pop_back();
        if(v.size()!=0) sum[i][0]={cap[i],v.back()};
        else sum[i][0]={cap[i],0};
        v.push_back(i);
    }
    for(int k=1;k<=20;k++){
        for(int i=1;i<=n;i++){
            sum[i][k][1]=sum[sum[i][k-1][1]][k-1][1];
            sum[i][k][0]=sum[i][k-1][0]+sum[sum[i][k-1][1]][k-1][0];
        }
    }
    while(q--){
        int i,val;
        cin>>i>>val;
        for(int k=20;k>=0;k--){
            if(val-sum[i][k][0]>0){
                val-=sum[i][k][0];
                i=sum[i][k][1];
            }
        }
        cout<<i<<endl;
    }
    
    return 0;
}

• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40