p-7-16子集和问题

# include<iostream>
	
	using namespace std;
	
	int a[10000], n, t, b[10000] = {0}, z = 0;
	int c[10000];
	void print(int k)
	{
		int i;
		z++;
		for(i = 1; i <= k; i++)
		{
			cout<<c[i]<<" ";
		}
		cout<<endl;
	}
	
	int ff()
	{
		int i = 1, sum = 0, j = 1;
		while(i > 0)
		{
			if(b[i] == 0)
			{
				b[i] = 1;
				sum += a[i];
				c[j] = a[i];
				j++;
				i++;
				if(sum == t)	return j;
				if(sum > t)
				{
					sum -= a[i-1];
					b[i-1] = 0;
					j--;
				}
				if(i > n)
				{
					i = n - 1;
					if(b[n] == 1)
					{
						sum -= a[n];
						b[n] = 0;
						j--;
						
					}    
					
					while(b[i] == 0)
					{
						i--;
						if(i < 0)    return 0;
					}
					j--;
					sum -= a[i];
					b[i] = 0;
					i++;
				}
			}
		}
		return 0;	
	} 
	
	int main()
	{
		int i, j, tol = 0;
		cin>>n>>t;
		for(i = 1; i <= n; i++)
		{
			cin>>a[i];
			tol += a[i];
		}
		if(tol >= t)
		{
			j = ff();
			if(j) 
			{
				print(j-1);
			}   
			else	cout<<"No Solution!";
		}
		else		cout<<"No Solution!";	
		return 0;
	}
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转载自blog.csdn.net/qq_43192537/article/details/103681040