Submission #375772

#	Time	Username	Problem	Language	Result	Execution time	Memory
375772		Kevin_Zhang_TW	Two Antennas (JOI19_antennas)	C++17	2 / 100	59 ms	6508 KiB

antennas

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l) == r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif 
const int MAX_N = 300010;

int n, h[MAX_N], a[MAX_N], b[MAX_N];
int q, ql[MAX_N], qr[MAX_N], res[MAX_N];

int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	cin >> n ;
	for (int i = 1;i <= n;++i)
		cin >> h[i] >> a[i] >> b[i];
	cin >> q;
	for (int i = 1;i <= q;++i) 
		cin >> ql[i] >> qr[i];

	if (n > 300)  return -1;

	auto valid = [&](int i, int j) {
		int dis = abs(j - i);
		return a[i] <= dis && dis <= b[i]
			&& a[j] <= dis && dis <= b[j];
	};

	for (int i = 1;i <= q;++i) {
		res[i] = -1;
		for (int j = ql[i];j <= qr[i];++j)
			for (int k = j + 1;k <= qr[i];++k) {
				if (valid(j, k))
					chmax(res[i], abs(h[j] - h[k]));
			}
	}

	for (int i = 1;i <= q;++i)
		cout << res[i] << '\n';

}

• Subtask 1: 2 / 2
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 65