Submission #1099987

#	Time	Username	Problem	Language	Result	Execution time	Memory
1099987		marvinthang	Bring Down the Grading Server (CEOI23_gradingserver)	C++17	20 / 100	519 ms	221336 KiB

gradingserver

/*************************************
*    author: marvinthang             *
*    created: 24.08.2023 16:39:02    *
*************************************/

#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

int S, Q;

void init(void) {
	cin >> S >> Q;
}

bool solve(long long ch, long long fh, long long cg, long long fg) {
	while (true) {
		if (ch > fg) {
			cg -= ch - fg;
		} else break;
		if (cg < 0) return true;
		if (cg > fh) {
			ch -= cg - fh;
		} else break;
		if (ch < 0) return false;
	}
	if (ch > fg) return true;
	if (cg > fh) return false;
	return fg - ch <= fh - cg;
}

const int MAX = 303;

int dp[MAX][MAX][MAX];

bool check(int, int, int, int);

int f(int ch, int cg, int fg) {
    if (ch <= 0) return 301;
    if (cg <= 0) return 0;
    int &fh = dp[ch][cg][fg];
    if (fh != -1) return fh;
    fh = f(ch, cg - 1, fg);
    while (fh <= 300 && !((fg && !check(cg, fg - 1, ch, fh)) || (ch > fg * S && !check(cg - ch + fg * S, fg, ch, fh)))) ++fh;
    return fh;
}

bool check(int ch, int fh, int cg, int fg) {
	return f(ch, cg, fg) <= fh;
}

void process(void) {
	if (S == 1) {
		while (Q--) {
			long long ch, fh, cg, fg;
			cin >> ch >> fh >> cg >> fg;
			cout << (solve(ch, fh, cg, fg) ? "YES" : "NO") << '\n';
		}
	} else {
		memset(dp, -1, sizeof(dp));
		while (Q--) {
			int ch, fh, cg, fg;
			cin >> ch >> fh >> cg >> fg;
			cout << (check(ch, fh, cg, fg) ? "YES" : "NO") << '\n';
		}
	}
}

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

Compilation message (stderr)

gradingserver.cpp: In function 'int main()':
gradingserver.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); }
      |                                                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
gradingserver.cpp:106:2: note: in expansion of macro 'file'
  106 |  file("grading-server");
      |  ^~~~
gradingserver.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); }
      |                                                                                       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
gradingserver.cpp:106:2: note: in expansion of macro 'file'
  106 |  file("grading-server");
      |  ^~~~

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 5: 0 / 25
• Subtask 4: 0 / 20
• Subtask 6: 0 / 20
• Subtask 7: 0 / 15