Submission #727056

#	Time	Username	Problem	Language	Result	Execution time	Memory
727056		SanguineChameleon	Strange Device (APIO19_strange_device)	C++17	10 / 100	5086 ms	524288 KiB

strange_device

#include <bits/stdc++.h>
using namespace std;

void just_do_it();

int main() {
	#ifdef KAMIRULEZ
		freopen("kamirulez.inp", "r", stdin);
		freopen("kamirulez.out", "w", stdout);
	#endif
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	just_do_it();
	return 0;
}

const int maxN = 1e6 + 20;
const long long inf = 1e18L + 20;
long long L[maxN];
long long R[maxN];

void just_do_it() {
	int N;
	long long A, B;
	cin >> N >> A >> B;
	for (int i = 0; i < N; i++) {
		cin >> L[i] >> R[i];
	}
	if (A > inf / B) {
		long long res = 0;
		for (int i = 0; i < N; i++) {
			res += R[i] - L[i] + 1;
		}
		cout << res;
		return;
	}
	set<pair<long long, long long>> S;
	for (int i = 0; i < N; i++) {
		for (long long j = L[i]; j <= R[i]; j++) {
			S.insert({(j + (j / B)) % A, j % B});
		}
	}
	cout << S.size();
}

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