Submission #393912

#	Time	Username	Problem	Language	Result	Execution time	Memory
393912		ritul_kr_singh	Strange Device (APIO19_strange_device)	C++17	10 / 100	621 ms	16988 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define sp << ' ' <<
#define nl << '\n'

const int INF = 1e18;

bool comp(array<int, 2> &x, array<int, 2> &y){
	return x[1] < y[1];
}

signed main(){
	cin.tie(0)->sync_with_stdio(0);

	int n, A, B, l, r; cin >> n >> A >> B;

	int g = A / __gcd(A, B + 1LL);

	if(g > INF / B) g = INF + 5;
	else g *= B;

	vector<array<int, 2>> q;

	while(n--){
		cin >> l >> r;
		int lm = l % g, rm = r % g;
		if(l + (g - lm) <= r) q.push_back({lm, g-1}), q.push_back({0, rm});
		else q.push_back({lm, rm});
	}

	int last = -1, res = 0;
	sort(q.begin(), q.end(), comp);

	for(auto &i : q){
		last = max(last, i[0] - 1LL);
		res += i[1] - last;
		last = i[1];
	}

	cout << res;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30