Submission #672024

#	Time	Username	Problem	Language	Result	Execution time	Memory
672024		ghostwriter	Worst Reporter 3 (JOI18_worst_reporter3)	C++17	100 / 100	564 ms	23372 KiB

worst_reporter3

// #pragma GCC optimize ("Ofast")
// #pragma GCC target ("avx2")
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
    #include <debug.h>
#else
    #define debug(...)
#endif
#define ft front
#define bk back
#define st first
#define nd second
#define ins insert
#define ers erase
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define bg begin
#define ed end
#define all(x) (x).bg(), (x).ed()
#define sz(x) (int)(x).size()
// #define int long long
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
#define FOR(i, l, r) for (int i = (l); i <= (r); ++i)
#define FOS(i, r, l) for (int i = (r); i >= (l); --i)
#define FRN(i, n) for (int i = 0; i < (n); ++i)
#define FSN(i, n) for (int i = (n) - 1; i >= 0; --i)
#define EACH(i, x) for (auto &i : (x))
#define WHILE while
template<typename T> T gcd(T a, T b) { T d2 = (a | b) & -(a | b); a /= d2; b /= d2; WHILE(b) { a = a % b; swap(a, b); } return a * d2; }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
void _assert(bool statement) { if (statement) return; cerr << "\n>> Assertion failed!\n"; exit(0); }
void _assert(bool statement, const str &message) { if (statement) return; cerr << "\n>> Assertion failed: " << message << '\n'; exit(0); }
void _error(const str &message) { cerr << "\n>> Error: " << message << '\n'; exit(0); }
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Tran The Bao - ghostwriter
    Training for VOI23 gold medal
----------------------------------------------------------------
    GOAT
----------------------------------------------------------------
*/
const int oo = 1e9 + 5;
const int N = 5e5 + 5;
int n, q, d[N];
void input(int test_id) {
	cin >> n >> q;
	FOR(i, 1, n) cin >> d[i];
}
int getp(int i, int t) {
	int times = t / d[i];
	return min(-i + 1LL * d[i] * times, 1LL * oo);
}
void solve(int test_id) {
	d[0] = 1;
	FOR(i, 1, n)
		if (d[i - 1] >= d[i]) d[i] = d[i - 1];
		else d[i] = (d[i] + d[i - 1] - 1) / d[i - 1] * d[i - 1];
	WHILE(q--) {
		int t, l, r;
		cin >> t >> l >> r;
		int lp = 0, rp = n, ansl = -1, ansr = -2;
		WHILE(lp <= rp) {
			int mid = lp + (rp - lp) / 2, npos = getp(mid, t);
			if (npos < l) rp = mid - 1;
			else if (npos > r) lp = mid + 1;
			else {
				ansl = mid;
				rp = mid - 1;
			}
		}
		lp = 0; rp = n;
		WHILE(lp <= rp) {
			int mid = lp + (rp - lp) / 2, npos = getp(mid, t);
			if (npos < l) rp = mid - 1;
			else if (npos > r) lp = mid + 1;
			else {
				ansr = mid;
				lp = mid + 1;
			}
		}
		cout << ansr - ansl + 1 << '\n';
	}
}
void reinit(int test_id) {

}
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    int test_num = 1;
    // cin >> test_num; // comment if the problem does not requires multitest
    FOR(i, 1, test_num) {
        input(i); // input in noninteractive problems for case #i
        solve(i); // main function to solve case #i
        reinit(i); // reinit global data to default used in case #i
    }
    #ifdef LOCAL
        cerr << "\nTime: " << setprecision(5) << fixed << (ldb)clock() / CLOCKS_PER_SEC << "ms.\n";
    #endif
    return 0;
}
/*
3 1
2
5
3
2 2 4
----------------------------------------------------------------
From Benq:
    stuff you should look for
        * int overflow, array bounds
        * special cases (n=1?)
        * do smth instead of nothing and stay organized
        * WRITE STUFF DOWN
        * DON'T GET STUCK ON ONE APPROACH
----------------------------------------------------------------
*/

• Subtask 1: 7 / 7
• Subtask 2: 12 / 12
• Subtask 3: 81 / 81