Submission #258899

#	Time	Username	Problem	Language	Result	Execution time	Memory
258899		AM1648	Strange Device (APIO19_strange_device)	C++17	100 / 100	939 ms	70468 KiB

strange_device

/* be name khoda */

#define long_enable
#include <iostream>
#include <algorithm>
#include <cstring>
#include <numeric>
#include <vector>
#include <fstream>
#include <set>
#include <map>
using namespace std;

#ifdef long_enable
typedef long long int ll;
#else
typedef int ll;
#endif

typedef pair<ll, ll> pii;
typedef pair<pii, ll> ppi;
typedef pair<ll, pii> pip;
typedef vector<ll> vi;
typedef vector<pii> vpii;

#define forifrom(i, s, n) for (ll i = s; i < n; ++i)
#define forirto(i, n, e) for (ll i = (n) - 1; i >= e; --i)
#define fori(i, n) forifrom (i, 0, n)
#define forir(i, n) forirto (i, n, 0)

#define F first
#define S second
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(), (x).end()
#define smin(a, b) a = min(a, (b))
#define smax(a, b) a = max(a, (b))

#define debug(x) cout << #x << " -> " << (x) << endl
#define debug2(x, y) cout << #x << ' ' << #y << " -> " << (x) << ' ' << (y) << endl
#define debug3(x, y, z) cout << #x << ' ' << #y << ' ' << #z << " -> " << (x) << ' ' << (y) << ' ' << (z) << endl
#define debug4(x, y, z, t) cout << #x << ' ' << #y << ' ' << #z << ' ' << #t << " -> " << (x) << ' ' << (y) << ' ' << (z) << ' ' << (t) << endl
#define debuga(x, n) cout << #x << " -> "; fori (i1_da, n) { cout << (x)[i1_da] << ' '; } cout << endl
#define debugaa(x, n, m) cout << #x << " ->\n"; fori (i1_daa, n) { fori (i2_daa, m) { cout << (x)[i1_daa][i2_daa] << ' '; } cout << '\n'; } cout << endl

const ll MOD = 1000000007;
const long long BIG = 1446803456761533460LL;

#define XL (x << 1)
#define XR (XL | 1)
#define MD ((l + r) >> 1)
#define Add(a, b) a = ((a) + (b)) % MOD
#define Mul(a, b) a = (1LL * (a) * (b)) % MOD

// -----------------------------------------------------------------------

const ll maxn = 1000010;
const ll maxa = 2000000000000000000;

ll n, A, B, g, m;
map<ll, ll> seg;

void add(ll l, ll r) {
    seg[l]++;
    seg[r]--;
    if (l >= r) {
        seg[0]++;
        seg[m]--;
    }
}

int main() {
    ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);

    cin >> n >> A >> B;
    g = gcd(A, B + 1);
    m = A / g;
    if (B > maxa / m + 10) m = maxa;
    else m *= B;
    fori (i, n) {
        ll l, r; cin >> l >> r; ++r;
        if (r - l >= m) return cout << m << '\n', 0;
        add(l % m, r % m);
    }
    ll ans = 0;
    ll lst = 0, ps = 0;
    for (auto [x, v] : seg) {
        if (ps) ans += x - lst;
        lst = x, ps += v;
    }
    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