Analizador sintactico descendente

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La entrada puede contener varios casos de prueba, cada caso consiste de una gramatica libre de contexto

G = (V, Σ, P, S)1 y una lista de cadenas para analizar de longitud n > 0.

Para cada caso de prueba debe imprimir una lista que contiene ´unicamente las palabras ‘si’ y ‘no’, donde ‘si’ representa que la cadena pertenece a L(G) y ‘no’ representa que no pertenece a L(G).

Si no se puede implementar el analizador

retornar el mensaje “error”, no analizar las cadenas y pasar al siguiente caso, si lo hay.

Input

Un numero entero c > 0 indicando el numero de casos de prueba que se van a recibir. Luego, c casos de

prueba con el siguiente formato:

1. Una linea con tres numeros m, k, n > 0, separados por espacios en blanco, donde m es el numero de

simbolos no terminales y k el n´umero de reglas (producciones) de la gramatica; n es el numero de

cadenas que se van a analizar.

2. Una linea con los m simbolos no terminales de la gramatica separados por espacios en blanco. El

primer simbolo (desde la izquierda) es el simbolo inicial de la gramatica (S).

3. Luego, k lıneas con las producciones de la gramatica con el formato A−α, donde A ∈ V y α ∈ (V ∪ Σ)∗.

La cadena vacia se representa con el simbolo e.

Despues, se debe recibir una lista de n > 0 cadenas, cada cadena en una linea independiente.

Output

Si no se puede implementar el analizador retornar el mensaje “error”. De lo contrario, por cada cadena de

la entrada imprimir ‘si’, si la cadena pertenece a L(G), o ‘no’, si la cadena no pertenece a L(G). Se debe

imprimir una linea independiente por cada cadena

Se tiene que calcular los conjuntos First y Follow. Tambien se debe implementar la funcion para calcular el conjunto Fisrt de una cadena.

Python Fleksibel Udvikling

Projekt ID: #37435684

Om projektet

26 bud Remote projekt Aktiv 2 måneder siden

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bilegal

Análisis de la entrada: Leer el número de casos de prueba (c). Para cada caso de prueba: Leer m, k y n. Leer los símbolos no terminales de la gramática. Leer las producciones de la gramática. Leer las n cadenas que se Flere

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