Submission #736168

#	Time	Username	Problem	Language	Result	Execution time	Memory
736168		marvinthang	Kronican (COCI16_kronican)	C++17	100 / 100	662 ms	4424 KiB

kronican

/*************************************
*    author: marvinthang             *
*    created: 05.08.2022 12:53:53    *
*************************************/

#include <bits/stdc++.h>

using namespace std;

#define                  fi  first
#define                  se  second
#define                 div  ___div
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define             FULL(i)  (MASK(i) - 1)
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#define          file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }

template <class T>             scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class T>            print_op(vector <T>)  { out << '{'; for (size_t i = 0; i + 1 < u.size(); ++i) out << u[i] << ", "; if (!u.empty()) out << u.back(); return out << '}'; }
template <class U, class V>   scan_op(pair <U, V>)  { return in >> u.fi >> u.se; }
template <class U, class V>  print_op(pair <U, V>)  { return out << '(' << u.fi << ", " << u.se << ')'; }
template <class A, class B>   inline bool minimize(A &a, B b)  { A eps = 1e-9; if (a > b + eps) { a = b; return true; } return false; }
template <class A, class B>   inline bool maximize(A &a, B b)  { A eps = 1e-9; if (a + eps < b) { a = b; return true; } return false; }

const double PI = 3.1415926535897932384626433832795; // acos(-1.0); atan(-1.0);
const int dir[] = {1, 0, -1, 0, 1, 1, -1, -1, 1}; // {2, 1, -2, -1, -2, 1, 2, -1, 2};
const int MAX = 20;

int K, N, C[MAX][MAX];
int F[MASK(MAX)];

int dp(int mask) {
	if (__builtin_popcount(mask) <= K) return 0;
	int &cur = F[mask];
	if (cur != -1) return cur;
	cur = 1e9;
	for (int hihi = mask; hihi; hihi &= hihi - 1) {
		int i = __builtin_ctz(hihi);
		for (int hjhj = mask; hjhj; hjhj &= hjhj - 1) {
			int j = __builtin_ctz(hjhj);
			if (i == j) continue;
			minimize(cur, dp(mask ^ MASK(i)) + C[i][j]);
		}
	}
	return cur;
}

void init(void) {
	cin >> N >> K;
	for (int i = 0; i < N; ++i)
		for (int j = 0; j < N; ++j)
			cin >> C[i][j];
}

void process(void) {
	memset(F, -1, sizeof(F));
	cout << dp(FULL(N)) << '\n';
}

int main(void) {
	ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
	file("coci1617_r3_kronican");
	init();
	process();
	// cerr << "Time elapsed: " << TIME << " s.\n";
	return (0^0);
}

Compilation message (stderr)

kronican.cpp: In function 'int main()':
kronican.cpp:22:69: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 | #define          file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }
      |                                                             ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
kronican.cpp:68:2: note: in expansion of macro 'file'
   68 |  file("coci1617_r3_kronican");
      |  ^~~~
kronican.cpp:22:103: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 | #define          file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }
      |                                                                                               ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
kronican.cpp:68:2: note: in expansion of macro 'file'
   68 |  file("coci1617_r3_kronican");
      |  ^~~~

• Subtask 1: 100 / 100