Submission #1183700

#	Time	Username	Problem	Language	Result	Execution time	Memory
1183700		gabyferaq	Fountain (eJOI20_fountain)	C++20	0 / 100	16 ms	12556 KiB

fountain

#include<bits/stdc++.h>
using namespace std;
vector<long> dmt,cap;
vector<vector<int>> sgtf,sgtv;
int aux;
long query(long a,long b)
{
    aux=sgtv[a].size()-2;
    if(b<=sgtv[a][0]) return a;
    else {
        while(sgtv[a][aux]>b&&sgtv[a][aux]!=0)
        {
            sgtv[a][aux--];
        }
        return sgtf[a][aux];
    }
}
void solve()
{
    long n,q;
    cin>>n>>q;
    dmt.assign(n+1,1e5+1);
    cap.assign(n+1,1e5+1);
    sgtf.resize(n+1,vector<int> (1,0));
    sgtv.resize(n+1,vector<int> (1,0));
    long a,b;
    for(int i=1; i<=n; i++)
    {
        cin>>a>>b;
        dmt[i]=a,cap[i]=b;
    }
    stack<long> pila;
    pila.push(0);
    for(int i=n; i>=1; i--)
    {
        sgtv[i][0]=cap[i];
        while(dmt[i]>=dmt[pila.top()])
        {
            pila.pop();
        }
        sgtf[i][0]=pila.top();
        pila.push(i);
    }
    int s;
    for(int i=1;i<=n;i++)
    {
        s=sgtf[i][0];
        while(s>0)
        {  
        sgtf[i].push_back(sgtf[s][0]);
        s=sgtf[s][0];
        }
        s=sgtv[i][0];
        for(auto x:sgtf[i])
        {
            if(s+sgtv[x][0]==s)
            sgtv[i].push_back(0);
            else sgtv[i].push_back(s+sgtv[x][0]);
            s+=sgtv[x][0];
        }
    }
    while(q--)
    {
        cin>>a>>b;
        cout<<query(a,b)<<endl;
    }
}
int main()
{
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    solve();
}

• Subtask 1: 0 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40