Submission #1159734

#	Time	Username	Problem	Language	Result	Execution time	Memory
1159734		uwubigbadboy	Fountain (eJOI20_fountain)	C++20	0 / 100	1589 ms	2304 KiB

fountain

#include <bits/stdc++.h>
using namespace std;
#define N 500005
#define sz size()
#define ll long long int
#define ff first
#define ss second
#define pb push_back
#define pt pop_back
#define M 1000000007
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pq priority_queue
ll  a[N], b, q, p[N], mx, mn, x[N], y[N], c, d, t, n, m, k, h, tr;
string s, g;
vector <ll> v;
int main() {
	ios::sync_with_stdio(false);cin.tie(0);
	cin >> n >> q;
	tr = 1;
	for(int i = 1; i <= n; i++){
		cin >> x[i] >> y[i];
		if(y[i] >= y[i + 1])tr = 0;
	}
	if(tr == 1){
		for(int i = 1; i <= n; i++){
			p[i] = p[i - 1] + y[i];
		}
		while(q--){
			cin >> c >> d;
			h = 0;
			int l = c, r = n;
			while(l <= r){
				int md = (l + r) / 2;
				if(p[md] - p[c - 1] > d)r = md - 1;
				else{
					l = md + 1;;
					h = md; 
				}
			}
			if(d > p[n] - p[c - 1])cout << 0 << '\n';
			else cout << h << '\n';
		}
		return 0;
	}
	while(q--){
		cin >> c >> d;
		h = 0;
		b = 0;
		for(int i = c; i <= n; i++){
			if(x[i] >= h){
				d -= y[i];
				h = x[i];
				b = i;
				if(d <= 0)break;
			}
		}
		if(d > 0)cout << 0 << '\n';
		else cout << b << '\n';
	}
}

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