Submission #56861

#	Time	Username	Problem	Language	Result	Execution time	Memory
56861		ksun48	Worst Reporter 3 (JOI18_worst_reporter3)	C++14	100 / 100	1294 ms	177724 KiB

worst_reporter3

#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
vector<LL> d;
vector<LL> jump;

LL get(LL t, LL pos){
	// at time t how many people are >= pos;
	LL s = -1; // yes
	LL e = d.size(); // no
	while(s + 1 < e){
		LL m = (s + e) / 2;
		// where is person m at certain time. 
		if((t / jump[m]) * jump[m] - m - 1 >= pos){
			s = m;
		} else {
			e = m;
		}	
	}
	return e + (t >= pos);
}
int main(){
	cin.sync_with_stdio(0); cin.tie(0);
	LL n;
	LL q;
	cin >> n >> q;
	d.resize(n);
	jump.resize(n);
	LL prev = 1;
	for(int i = 0; i < n; i++){
		cin >> d[i];
		LL numc = (d[i] + prev - 1) / prev;
		jump[i] = prev * numc;
		prev = jump[i];
	}
	for(int i = 0; i < q; i++){
		LL t, l, r;
		cin >> t >> l >> r;
		cout << get(t,l) - get(t,r+1) << '\n';
	}
}

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81