int ** lcsLength(int *x,int *y,int m,int n){
	int b[m][n],c[m][n];
	for(int i=0;i<m;i++)
		for(int j=0;j<n;j++)
			b[i][j]=0;
	for(int i=0;i<m;i++)
		for(int j=0;j<n;j++)
			c[i][j]=0;
	for(int i=1;i<m;i++) c[i][0] = 0;
	for(int j=0;j<n;j++) c[0][j] = 0;
	for(int i=1;i<m;i++){
		for(int j=1;j<n;j++){
			if(x[i]==y[j]){
				c[i][j] = c[i-1][j-1] + 1;
				b[i][j] = 1;
			}
			else if(c[i-1][j]>c[i][j-1]){
				c[i][j] = c[i-1][j];
				b[i][j] = 2;
			}
			else {
				c[i][j] = c[i][j-1];
				b[i][j] = -1;
			}
		}
	}
	int **a = new int*[m];
	for(int i=0;i<m;i++){
		a[i] = new int[n];
		for(int j=0;j<n;j++){
			a[i][j] = b[i][j];
		}
	}
	return a;
}

void printLCS(int **b,int *x,int i,int j){
	if(i==0||j==0) return;
	if(b[i][j]==1){
		printLCS(b,x,i-1,j-1);
		cout<<x[i]<<"	";
	}
	else if(b[i][j]==2)
		printLCS(b,x,i-1,j);
	else
		printLCS(b,x,i,j-1);
}