Submission #576541

#	Time	Username	Problem	Language	Result	Execution time	Memory
576541		Jassar	Fountain (eJOI20_fountain)	C++14	30 / 100	255 ms	3520 KiB

fountain

#include <bits/stdc++.h>
#define ll long long

using namespace std;

int main()
{
	ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	ll n,q;
	cin >> n >> q;
	vector<pair<ll , ll>> v;
	stack<ll> s;
    ll sum[n];
	for (ll i=0; n>i; i++)
    {
        ll a,b;
        cin >> a >> b;
        v.push_back({a , b});
        sum[i] = v[i].second;
        if (i > 0) sum[i] += sum[i-1];
    }
    while (q--)
    {
        ll a,b;
        cin >> a >> b;
        a--;
        int g = b;
        if (a > 0)
        {
            g += sum[a-1];
        }
        int l = 0 , mid = (n / 2) , r = n;
        while (l != r)
        {
            if (sum[mid] >= g)
            {
                r = mid;
                mid = (r + l) / 2;
            }
            else
            {
                l = mid + 1;
                mid = (l + r) / 2;
            }
        }
        if (r == n)
        {
            cout << 0 << endl;
        }
        else
        {
            cout << l + 1 << endl;
        }
    }
	return 0;
}

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