Submission #498056

#	Time	Username	Problem	Language	Result	Execution time	Memory
498056		Karabasan	Fountain (eJOI20_fountain)	C++17	60 / 100	73 ms	6336 KiB

fountain

#include <bits/stdc++.h>
#define ll long long
#define fast1 ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define endl "\n"
#define int long long
using namespace std;
#pragma GCC optimize("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,avx")
#pragma GCC optimize("unroll-loops")

int n,m,k,q;
int d[100005];
int c[100005];
int pre[100005];
void solve()
{
    cin>>n>>q;
    for(int i=1;i<=n;i++)
        cin>>d[i]>>c[i];
    if(n<=1000)
    {
        while(q--)
        {
            int a,b;
            cin>>a>>b;
            for(int i=a;i<=n;i++)
            {
                b-=c[i];
                if(b<=0)
                {
                    cout<<i<<endl;
                    break;
                }
                int son=i;
                while(d[i+1]<=d[son])
                    i++;
            }
            if(b>0)
                cout<<0<<endl;
        }
    }
    else
    {
        pre[1]=c[1];
        for(int i=2;i<=n;i++)
            pre[i]=pre[i-1]+c[i];
        while(q--)
        {
            int a,b;
            cin>>a>>b;
            int cvp=lower_bound(pre+a,pre+1+n,b+pre[a-1])-pre;
            if(cvp<=n)
                cout<<cvp<<endl;
            else cout<<cvp<<endl;
        }
    }
}
signed main()
{
    fast1
    //freopen ("lca.gir","r",stdin);
    //freopen ("lca.cik","w",stdout);
    int t=1;
    //cin>>t;
    while(t--)
    {
        solve();
    }
    return 0;
}

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