Submission #41558

#	Time	Username	Problem	Language	Result	Execution time	Memory
41558		farmersrice	Question (Grader is different from the original contest) (CEOI14_question_grader)	C++14	100 / 100	1598 ms	170688 KiB

encoder

#include <bits/stdc++.h>
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
//#pragma GCC target ("avx,tune=native")
//Use above if bruteforcing with lots of small operations. Or just use it anytime, there's no downside. AVX is better slightly
/*
TASK: hidden
LANG: C++11
*/
using namespace std;
typedef long long ll;
typedef pair<int, int> pair2;
typedef pair<int, pair<int, int> > pair3;
typedef pair<int, pair<int, pair<int, int> > > pair4;
#define MAXN 950
#define INF 1000000000000000000LL
#define mp make_pair
#define add push_back
#define remove pop

int subset[MAXN];
bool generated;
void generateSubsets() {
	int gc = 1;
	for (int i = 0; i < (1 << 12); i++) {
		int counter = 0;
		for (int j = 0; j < 12; j++) {
			if ((i & (1 << j))) counter++;
		}

		if (counter == 6) {
			subset[gc++] = i;
		}
	}
}

int encode(int n, int x, int y) {
	if (!generated) {
		generated = true;
		generateSubsets();
	}
	for (int i = 0; i < 12; i++) {
		if ((subset[x] & (1 << i)) && !(subset[y] & (1 << i))) return i + 1;
	}
}

decoder

#include <bits/stdc++.h>
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
//#pragma GCC target ("avx,tune=native")
//Use above if bruteforcing with lots of small operations. Or just use it anytime, there's no downside. AVX is better slightly
/*
TASK: hidden
LANG: C++11
*/
using namespace std;
typedef long long ll;
typedef pair<int, int> pair2;
typedef pair<int, pair<int, int> > pair3;
typedef pair<int, pair<int, pair<int, int> > > pair4;
#define MAXN 200013
#define INF 1000000000000000000LL
#define mp make_pair
#define add push_back
#define remove pop

int subset[MAXN];
bool generated;
void generateSubsets() {
	int gc = 1;
	for (int i = 0; i < (1 << 12); i++) {
		int counter = 0;
		for (int j = 0; j < 12; j++) {
			if ((i & (1 << j))) counter++;
		}

		if (counter == 6) {
			subset[gc++] = i;
		}
	}
}

int decode(int n, int q, int h) {
	if (!generated) {
		generated = true;
		generateSubsets();
	}
	h--;

	for (int i = 0; i < 12; i++) {
		if (subset[q] & (1 << h)) {
			return 1;
		} else {
			return 0;
		}
	}
}

Compilation message (stderr)

encoder.cpp: In function 'int encode(int, int, int)':
encoder.cpp:45:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

decoder.cpp: In function 'int decode(int, int, int)':
decoder.cpp:51:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• Subtask 1: 100 / 100