Submission #892645

#	Time	Username	Problem	Language	Result	Execution time	Memory
892645		marvinthang	Bodyguard (JOI21_bodyguard)	C++17	42 / 100	25111 ms	281428 KiB

bodyguard

/*************************************
*    author: marvinthang             *
*    created: 25.12.2023 20:42:18    *
*************************************/

#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 << '}'; }
template <class A, class B> bool minimize(A &a, B b)  { return a > b ? a = b, true : false; }
template <class A, class B> bool maximize(A &a, B b)  { return a < b ? a = b, true : false; }

// end of template

const int MAXN = 2801;
const int MAXQ = 3003;
const int MAXV = MAXN * 2 + MAXQ;

int ma[MAXV][MAXV][2];
long long dp[MAXV][MAXV];

void process(void) {
	int n, q; cin >> n >> q;
	vector <long long> x(n), y(n), u(n), v(n), c(n);
	vector <long long> cx, cy;
	REP(i, n) {
		long long t, a, b;
		cin >> t >> a >> b >> c[i]; c[i] /= 2;
		x[i] = t + a; 
		y[i] = t - a;
		u[i] = t + abs(a - b) + b;
		v[i] = t + abs(a - b) - b;
		cx.push_back(x[i]); cx.push_back(u[i]);
		cy.push_back(y[i]); cy.push_back(v[i]);
	}
	vector <long long> s(q), t(q);
	sort(ALL(cx)); cx.erase(unique(ALL(cx)), cx.end());
	sort(ALL(cy)); cy.erase(unique(ALL(cy)), cy.end());

	REP(i, n) {
		x[i] = lower_bound(ALL(cx), x[i]) - cx.begin();
		y[i] = lower_bound(ALL(cy), y[i]) - cy.begin();
		u[i] = lower_bound(ALL(cx), u[i]) - cx.begin();
		v[i] = lower_bound(ALL(cy), v[i]) - cy.begin();
		if (x[i] == u[i]) {
			FOR(p, y[i], v[i]) maximize(ma[x[i]][p][0], c[i]);
		} else {
			FOR(p, x[i], u[i]) maximize(ma[p][y[i]][1], c[i]);
		}
	}

	REPD(x, cx.size()) REPD(y, cy.size()) {
		if (y + 1 < (int) cy.size()) maximize(dp[x][y], dp[x][y + 1] + 1LL * (cy[y + 1] - cy[y]) * ma[x][y][0]);
		if (x + 1 < (int) cx.size()) maximize(dp[x][y], dp[x + 1][y] + 1LL * (cx[x + 1] - cx[x]) * ma[x][y][1]);
	}

	while (q--) {
		long long p, q; cin >> p >> q; 
		tie(p, q) = pair{p + q, p - q};	
		int u = lower_bound(ALL(cx), p) - cx.begin();
		int v = lower_bound(ALL(cy), q) - cy.begin();
		long long res = 0;
		FOR(x, u, cx.size()) maximize(res, dp[x][v] + (v ? 1LL * (cy[v] - q) * ma[x][v - 1][0] : 0));
		FOR(y, v, cy.size()) maximize(res, dp[u][y] + (u ? 1LL * (cx[u] - p) * ma[u - 1][y][1] : 0));
		cout << res << '\n';
	}
}

int main(void) {
	ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
	file("JOI21_bodyguard");
	// int t; cin >> t; while (t--)
	process();
	// cerr << "Time elapsed: " << TIME << " s.\n";
	return (0^0);
}

Compilation message (stderr)

bodyguard.cpp: In function 'int main()':
bodyguard.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); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bodyguard.cpp:103:2: note: in expansion of macro 'file'
  103 |  file("JOI21_bodyguard");
      |  ^~~~
bodyguard.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); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
bodyguard.cpp:103:2: note: in expansion of macro 'file'
  103 |  file("JOI21_bodyguard");
      |  ^~~~

• Subtask 1: 0 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 20 / 20
• Subtask 5: 0 / 52