Submission #687333

#	Time	Username	Problem	Language	Result	Execution time	Memory
687333		Em1L	Fountain (eJOI20_fountain)	C++17	0 / 100	1579 ms	3668 KiB

fountain

#include <bits/stdc++.h>
using namespace std;

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    
    int n, q, vol, pos; cin >> n >> q;
    
    vector < pair < int, int > > v(n);
    
    for (int i = 0; i < n; i++) cin >> v[i].first >> v[i].second;
    
    vector < int > pour(n);
    stack < int > st;
    
    for (int i = n - 1; i >= 0; i--)
    {
        while (!st.empty() and v[st.top()] <= v[i]) st.pop();
        
        pour[i] = (st.empty() ? -1 : st.top());
        
        st.push(i);
    }
    
    for (int i = 0; i < q; i++)
    {
        cin >> pos >> vol; pos--;
        
        while (pos != -1)
        {
            vol -= v[pos].second;
            
            if (vol <= 0) break;
            
            pos = pour[pos];
        }
        
        cout << pos + 1 << '\n';
    }
}

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