Submission #415379

#	Time	Username	Problem	Language	Result	Execution time	Memory
415379		Kevin_Zhang_TW	Mechanical Doll (IOI18_doll)	C++17	47 / 100	243 ms	15828 KiB

doll

#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;
#include "doll.h"

void create_circuit(int M, std::vector<int> A) {
	int n = A.size();
	// C is the place where the ith trigger connect to

	vector<int> C(M + 1), X, Y;

	auto new_s = [&]() {
		int ret = X.size();
		X.pb(-1), Y.pb(-1);
		return ret;
	};

	function<int(vector<int>)> create = [&](vector<int> target) {
		if (target.size() == 1) {
			return target[0];
		}
		int cur = new_s();
		{
			int osz = target.size();
			while (osz != (osz&-osz)) 
				osz += osz&-osz;
			vector<int> nt;
			for (int i = target.size();i < osz;++i)
				nt.pb( - (cur+1) );
			for (int u : target) nt.pb(u);
			target = nt;
			//target.insert(begin(target), - (cur+1) );
		}
		vector<int> L, R;
		for (int i = 0;i < target.size();++i) {
			(i&1?R:L).pb(target[i]);
		}
		int a = create(L), b = create(R);
		X[cur] = a, Y[cur] = b;
		return - (cur+1);
	};

	A.pb(0);

	vector<vector<int>> pos(M + 1);

	for (int i = 0;i < n;++i)
		pos[ A[i] ].pb(i);

	C[0] = A[0];
	int g = create(vector<int>(begin(A)+1, end(A)));

	for (int i = 1;i <= M;++i)
		C[i] = g;

//	for (int i = 1;i <= M;++i) if (pos[i].size()) {
//		vector<int> nxt;
//		for (int j : pos[i]) nxt.pb( A[j+1] );
//		C[i] = create(nxt);
//	}

	debug(AI(C));

	DE(n, X.size(), Y.size());
	//assert(X.size() <= n + __lg(n) + 10);

	answer(C, X, Y);

}

Compilation message (stderr)

doll.cpp: In lambda function:
doll.cpp:50:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |   for (int i = 0;i < target.size();++i) {
      |                  ~~^~~~~~~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:15:20: warning: statement has no effect [-Wunused-value]
   15 | #define debug(...) 0
      |                    ^
doll.cpp:77:2: note: in expansion of macro 'debug'
   77 |  debug(AI(C));
      |  ^~~~~
doll.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
doll.cpp:79:2: note: in expansion of macro 'DE'
   79 |  DE(n, X.size(), Y.size());
      |  ^~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 9.0000000036 / 18
• Subtask 6: 28.0000000112 / 56