Submission #558348

#	Time	Username	Problem	Language	Result	Execution time	Memory
558348		InternetPerson10	Strange Device (APIO19_strange_device)	C++17	100 / 100	774 ms	85348 KiB

strange_device

#include <bits/stdc++.h>
typedef long long ll;

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int q;
    ll a, b;
    cin >> q >> a >> b;
    __int128 cyc = (__int128)a * b / __gcd(a, b + 1);
    ll MOD = 1e18 + 9;
    if(MOD > cyc) MOD = cyc;
    map<ll, int> m;
    while(q--) {
        ll l, r;
        cin >> l >> r;
        r++;
        if(r - l >= MOD) {
            m[0]++;
            m[MOD]--;
        }
        else if(r/MOD != l/MOD) {
            m[l%MOD]++;
            m[0]++;
            m[MOD]--;
            m[r%MOD]--;
        }
        else {
            m[l%MOD]++;
            m[r%MOD]--;
        }
    }
    ll ans = 0, x = 0;
    for(auto p : m) {
        if(x == 0) ans -= p.first;
        x += p.second;
        if(x == 0) ans += p.first;
    }
    cout << ans << '\n';
}

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