Submission #162629

#	Time	Username	Problem	Language	Result	Execution time	Memory
162629		MvC	Plus Minus (BOI17_plusminus)	C++11	12 / 100	537 ms	632 KiB

plusminus

#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
#include <bits/stdc++.h>
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define mkp make_pair
#define in insert
#define er erase
#define fd find
#define fr first
#define sc second
typedef long long ll;
typedef long double ld;
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll llinf=(1LL<<62);
const int inf=(1<<30);
const int nmax=1e5+50;
const int mod=1e9+7;
using namespace std;
int n,m,k,o[10],z[10],rs,i,x,y,b[10];
char c;
void rec(int i)
{
	if(i==n)
	{
		int bl=0,nr;
		for(int j=0;j<n-1;j++)
		{
			for(int t=0;t<m-1;t++)
			{
				nr=0;
				if(b[j]&(1<<t))nr++;
				if(b[j]&(1<<(t+1)))nr++;
				if(b[j+1]&(1<<t))nr++;
				if(b[j+1]&(1<<(t+1)))nr++;
				if(nr!=2)
				{
					bl=1;
					break;
				}
			}
			if(bl)break;
		}
		if(!bl)
		{
			rs++;
			/*for(int j=0;j<n;j++)
			{
				for(int t=0;t<m;t++)
				{
					if(b[j]&(1<<t))cout<<1;
					else cout<<0;
				}
				cout<<endl;
			}
			cout<<endl;*/
		}
		return;
	}
	for(int j=0;j<(1<<m);j++)
	{
		if((o[i]&j)!=o[i] || (z[i]&j)!=0)continue;
		b[i]=j;
		rec(i+1);
	}
}
int main()
{
	//freopen("sol.in","r",stdin);
	//freopen("sol.out","w",stdout);
	//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
	ios_base::sync_with_stdio(false);cin.tie(0);cerr.tie(0);cout.tie(0);
	cin>>n>>m>>k;
	for(i=1;i<=k;i++)
	{
		cin>>c>>x>>y;
		x--,y--;
		if(c=='+')o[x]|=(1<<y);
		else z[x]|=(1<<y);
	}
	rec(0);
	cout<<rs<<endl;
	return 0;
}

Compilation message (stderr)

plusminus.cpp:2:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("O3")
 
plusminus.cpp:3:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization("unroll-loops")

• Subtask 1: 12 / 12
• Subtask 2: 0 / 42
• Subtask 3: 0 / 46