Submission #1367092

#	Time	Username	Problem	Language	Result	Execution time	Memory
1367092		serendipitous	Strange Device (APIO19_strange_device)	C++20	0 / 100	5094 ms	456 KiB

strange_device

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

map<pair<ll, ll>, bool> store;

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    ll n, a, b; cin >> n >> a >> b;
    ll ans = 0;
    for(int i = 0; i < n; ++i) {
        ll l, r; cin >> l >> r;
        for(ll k = 0; k < b; ++k) {
            // all congruent to l + k
            ll l_eq = l + k;
            ll r_eq = b*(r/b) + (l_eq%b); // at least l
            if(r_eq > r) {
                ans += min((r_eq - l_eq)/b, a);
            } else {
                ans += min((r_eq - l_eq)/b + 1, a);
            }
        }
    }
    cout << ans;
}

• 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