Submission #1024710

#	Time	Username	Problem	Language	Result	Execution time	Memory
1024710		vjudge1	Fountain (eJOI20_fountain)	C++17	0 / 100	177 ms	4000 KiB

fountain

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

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, q;
    cin>>n>>q;
    long long int d[n], c[n], prefix_sum[n+1];
    bool subtask1=0;
    prefix_sum[n]=INT_MAX;
    for(int i=0; i<n; i++)
    {
        cin>>d[i]>>c[i];
        if(i>1 && d[i-1]>=d[i])
        {
            subtask1=1;
        }
        prefix_sum[i]=c[i];
        if(i>=1)
        {
            prefix_sum[i]+=prefix_sum[i-1];
        }
    }
    if(subtask1)
    {
        while(q--)
        {
            long long int nivo, voda;
            cin>>nivo>>voda;
            long long int curr=nivo, prev=d[nivo-1];
            voda-=c[nivo-1];
            bool kiki=0;
            for(int i=nivo; i<n; i++)
            {
                if(d[i]>prev && voda>0)
                {
                    prev=d[i];
                    voda-=c[i];
                    curr=i+1;
                }
                if(voda<=0)
                {
                    kiki=1;
                }
            }
            if(kiki)
                cout<<curr<<"\n";
            else
                cout<<0<<"\n";
        }
    }
    else                            //subtask2
    {
        while(q--)
        {
            long long int nivo, voda, rez=nivo;
            cin>>nivo>>voda;
            int l=nivo-1, r=n;
            while(r-l>1)
            {
                int mid=(l+r)/2;
                long long int aa=0;
                if(nivo==1)
                    aa=0;
                else
                    aa=prefix_sum[nivo-2];
                if(prefix_sum[mid]-aa>=voda)
                {
                    r=mid;
                }
                else
                {
                    l=mid;
                }
            }
            rez=r;
            if(rez==n)
                cout<<"0\n";
            else
                cout<<rez+1<<"\n";
            cout.flush();
        }
    }
    

    return 0;
}

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