Submission #876079

#	Time	Username	Problem	Language	Result	Execution time	Memory
876079		marvinthang	New Home (APIO18_new_home)	C++17	10 / 100	300 ms	33972 KiB

new_home

/*************************************
*    author: marvinthang             *
*    created: 21.11.2023 14:25:44    *
*************************************/

#include <bits/stdc++.h>

using namespace std;

#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i-- > 0; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif

template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }

// end of template

const int INF = 1e8;

struct Store {
	int x, t, a, b;
	Store(int x, int t, int a, int b): x(x), t(t), a(a), b(b) {}
};

void process(void) {
	int n, q, k; cin >> n >> k >> q;
	vector <vector <int>> pos(k);
	REP(i, n) {
		int x, t, a, b; cin >> x >> t >> a >> b; --t;
		pos[t].push_back(x);
	}
	vector <pair <int, int>> up, down;
	for (auto &pos: pos) {
		sort(ALL(pos));
		if (pos.empty()) {
			REP(i, q) cout << "-1\n";
			return;
		}
		REP(i, pos.size()) {
			int rr = i == (int) pos.size() - 1 ? INF : (pos[i] + pos[i + 1]) / 2;
			up.emplace_back(rr, rr - pos[i]);
			int ll = !i ? 1 : (pos[i - 1] + pos[i] + 1) / 2;
			down.emplace_back(ll, pos[i] - ll);
		}
	}

	sort(ALL(down), [&] (const pair <int, int> &a, const pair <int, int> &b) {
		return pair {a.fi, b.se} < pair {b.fi, a.se};
	});

	int last = 0;
	vector <pair <int, int>> new_down;
	for (auto [x, y]: down) if (x + y > last) {
		last = x + y;
		new_down.emplace_back(x, y);
	}
	down = move(new_down);

	sort(up.rbegin(), up.rend());
	last = INF;
	vector <pair <int, int>> new_up;
	for (auto [x, y]: up) if (x - y < last) {
		last = x - y;
		new_up.emplace_back(x, y);
	}
	up = move(new_up);
	while (q--) {
		int l, y; cin >> l >> y;
		auto it = prev(upper_bound(ALL(down), l, [&] (const int &x, const pair <int, int> &y) { return x < y.fi; }));
		int res = it->se - l + it->fi;
		it = prev(upper_bound(ALL(up), l, [&] (const int &x, const pair <int, int> &y) { return x > y.fi; }));
		res = max(res, it->se - it->fi + l);
		cout << res << '\n';
	}
}

int main(void) {
	ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
	file("new_home");
	// int t; cin >> t; while (t--)
	process();
	// cerr << "Time elapsed: " << TIME << " s.\n";
	return (0^0);
}

Compilation message (stderr)

new_home.cpp: In function 'int main()':
new_home.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
new_home.cpp:106:2: note: in expansion of macro 'file'
  106 |  file("new_home");
      |  ^~~~
new_home.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
new_home.cpp:106:2: note: in expansion of macro 'file'
  106 |  file("new_home");
      |  ^~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 10 / 10
• Subtask 4: 0 / 23
• Subtask 5: 0 / 35
• Subtask 6: 0 / 20