Submission #70426

#	Time	Username	Problem	Language	Result	Execution time	Memory
70426		MrTEK	Norela (info1cup18_norela)	C++14	0 / 100	6 ms	556 KiB

norela

#include <bits/stdc++.h>

using namespace std;
#define mp make_pair
#define pb push_back
#define len(a) (int)a.size()
#define fi first
#define sc second
#define d1(w) cerr<<#w<<":"<<w<<endl;
#define d2(w,c) cerr<<#w<<":"<<w<<" "<<#c<<":"<<c<<endl;
#define d3(w,c,z) cerr<<#w<<":"<<w<<" "<<#c<<":"<<c<<" "<<#z<<":"<<z<<endl;
#define left isc+isc
#define right isc+isc+1
#define mid (l+r)/2
#define FAfi_IO ios_base::sync_with_fidio(false);
#define escl '\n'
#define bit __builtin_popcount

typedef long long int ll;

const int maxn = 620;
const long long LINF = 1e18;
const int LOG = 31;
const int INF = 1e9;
const int N = 65;
const int M = 26;
const int SQ = 350;
const int MOD = 998244353;

typedef long long int lli;
typedef pair<int,int> pii;

vector <int> v[N];

int n,m;
ll tar,ans,a[N];

int my_min(int x,int y) {
	if (bit(x) < bit(y)) return x;
	if (bit(x) > bit(y)) return y;
	for (int i = 0 ; i < m ; i++) {
		int a = x & (1 << i) , b = y & (1 << i);
		if (a > b) return x;
		if (a < b) return y;
	}
	return x;
}

void brute(int cur,ll mask,int sum) {
	if (mask == tar) {
		ans = my_min(ans,sum);
		return;
	}
	if (cur == m) return ;
	brute(cur + 1,mask,sum);
	brute(cur + 1,mask ^ a[cur], sum + (1 << cur));
}

int main() {

	scanf("%d %d",&n,&m);
	tar = (1ll << n) - 1;
	ans = (1ll << m) - 1;
	for (int i = 0 ; i < m ; i++) {
		int q;
		scanf("%d",&q);
		for (int j = 1 ; j <= q ; j++) {
			int x;
			scanf("%d",&x);
			a[i] = a[i] ^ (1 << (x - 1));
		}
	}
	brute(0,0,0);
	printf("%d\n",bit(ans));
	for (int i = 0 ; i < m ; i++) {
		if ((1 << i) & ans)
			printf("%d ",i + 1);
	}
}

Compilation message (stderr)

norela.cpp: In function 'int main()':
norela.cpp:61:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~
norela.cpp:66:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&q);
   ~~~~~^~~~~~~~~
norela.cpp:69:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&x);
    ~~~~~^~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25