Submission #1067603

#	Time	Username	Problem	Language	Result	Execution time	Memory
1067603		DeathIsAwe	Strange Device (APIO19_strange_device)	C++17	35 / 100	967 ms	71656 KiB

strange_device

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

int main() {
    ll n, a, b; cin >> n >> a >> b;
    vector<pair<ll,ll>> turnedon(n);
    __int128_t divisor = (__int128_t)lcm(a, b + 1);
    __int128_t num = divisor - (__int128_t)(divisor / (b + 1));
    for (int i=0;i<n;i++) {
        cin >> turnedon[i].first >> turnedon[i].second;
    }
    ll limit;
    if (num > 1000000000000000000) {
        limit = 1000000000000000001;
    } else {
        limit = num;
    }


    vector<pair<ll,ll>> ansarr;
    for (int i=0;i<n;i++) {
        if (turnedon[i].second - turnedon[i].first + 1 >= limit) {
            cout << limit;
            return 0;
        }
        turnedon[i].first %= limit; turnedon[i].second %= limit;
        if (turnedon[i].first > turnedon[i].second) {
            ansarr.push_back(make_pair(turnedon[i].first, limit - 1));
            ansarr.push_back(make_pair(0, turnedon[i].second));
        } else {
            ansarr.push_back(make_pair(turnedon[i].first, turnedon[i].second));
        }
    }
    sort(ansarr.begin(), ansarr.end());
    ll ans = 0, tracker = -1;
    for (pair<ll,ll> j: ansarr) {
        if (tracker < j.first) {
            ans += j.second - j.first + 1;
            tracker = j.second;
        } else if (tracker < j.second) {
            ans += j.second - tracker;
            tracker = j.second;
        }
    }
    cout << ans;
}

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