제출 #576515

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
576515		ammar124	Fountain (eJOI20_fountain)	C++14	60 / 100	1548 ms	3268 KiB

fountain

#include <bits/stdc++.h>
#define endl '\n'
#define ll long long
using namespace std;
int const maxin = 1e5+6;
int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int a,q;
    bool flag = true ;
    cin>>a>>q;
    pair<ll , ll> arr[a];
    arr[0].first = 0;
    for(int i=1;i<a+1;i++)
    {
        cin>>arr[i].first>>arr[i].second;
        if(arr[i-1].first >= arr[i].first)
            flag = false ;
    }
    if(flag)
    {
        ll prf[a+1] = {0};
        for(int i=1;i<a+1;i++)
        {
            prf[i] = prf[i-1] + arr[i].second;
        }
        while(q--)
        {
            ll x,y;
            cin>>x>>y;
            y+=prf[x-1];
            if(y > prf[a])
                cout<<0<<endl;
            else
                cout<<lower_bound(prf,prf+a+1,y)-prf<<endl;
        }
    }
    else
    {
        while(q--)
        {
            ll x,y;
            cin>>x>>y;
            ll last = arr[x].first;
            y-=arr[x].second;
            if(y <= 0)
                cout<<x<<endl;
            else
            {
                for(int i=x+1;i<a+1;i++)
                {
                    if(arr[i].first > last)
                    {
                        last = arr[i].first;
                        y-=arr[i].second;
                    }
                    if(y <= 0)
                    {
                        cout<<i<<endl;
                        break;
                    }
                }
                if(y > 0)
                    cout<<0<<endl;
            }
        }
    }
    return 0;
}

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