Submission #415433

#	Time	Username	Problem	Language	Result	Execution time	Memory
415433		Kevin_Zhang_TW	Mechanical Doll (IOI18_doll)	C++17	53 / 100	253 ms	14416 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;
	};

	auto addf = [&](vector<int> a, int f) {
		a.insert(begin(a), f);
		return a;
	};
	
	auto sid = [&](int id) { return - (id+1); };
 
	function<int(vector<int>)> create = [&](vector<int> target) {
		if (target.size() == 1) {
			return target[0];
		}
		int cur = new_s();
		if (target.size() & 1) {
			//vector<int> nt;
			//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];
 
	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(X.size(), Y.size());
 
	answer(C, X, Y);
 
}

Compilation message (stderr)

doll.cpp: In lambda function:
doll.cpp:53:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |   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:76:2: note: in expansion of macro 'debug'
   76 |  debug(AI(C));
      |  ^~~~~
doll.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
doll.cpp:77:2: note: in expansion of macro 'DE'
   77 |  DE(X.size(), Y.size());
      |  ^~
doll.cpp:33:7: warning: variable 'addf' set but not used [-Wunused-but-set-variable]
   33 |  auto addf = [&](vector<int> a, int f) {
      |       ^~~~
doll.cpp:38:7: warning: variable 'sid' set but not used [-Wunused-but-set-variable]
   38 |  auto sid = [&](int id) { return - (id+1); };
      |       ^~~

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