Submission #409640

#	Time	Username	Problem	Language	Result	Execution time	Memory
409640		tempus	Strange Device (APIO19_strange_device)	C++17	0 / 100	5087 ms	524292 KiB

strange_device

#include <bits/stdc++.h>

#define ll long long
#define endl "\n"
#define ios ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0);

using namespace std;

int main() {
    ios
    int n;
    cin >> n;
    ll A, B;
    cin >> A >> B;
    ll S = 0;
    ll val = A * B / __gcd(B - 1, A);
    map <ll, ll> was;
    ll l[n], r[n], ans = 0;
    for (int i = 0; i < n; ++ i) {
        cin >> l[i] >> r[i];
        S += r[i] - l[i] + 1;
    }
    if (A > 1e18 / B + 1) {
        cout << S;
        return 0;
    }
    for (int i = 0; i < n; ++ i) {
        for (int j = l[i]; j <= r[i]; ++ j) {
            if (was[j % val]);
            else ++ ans;
            was[j % val] = 1;
        }
    }
    cout << ans;
    return 0;
}

• Subtask 1: 0 / 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