"""
class Matrice:
    def __init__(self,x,y):
        self.x = x
        self.y = y
        self.dct = {}  #=dict()
        for i in range(y):
            for j in range(x):
                self.dct[ (i,j) ] = 0
                
    def get(self,x,y):
        return  self.dct[ (x,y) ]
        
    def set(self,x,y,val):
        self.dct[ (x,y) ]  = val
    
    def afficher(self):
        for i in range(self.y):
            for j in range(self.x):
                print(self.dct[ (i,j) ]," ",end="")
            print()
"""

"""
class Matrice:
    def __init__(self,x,y):
        self.x = x
        self.y = y
        self.lst = [0]*(x*y)
                
    def get(self,x,y):
        return  self.lst[ y * self.x + x ]
        
    def set(self,x,y,val):
        self.lst[ y * self.x + x ] = val
    
    def afficher(self):
        for i in range(self.y):
            for j in range(self.x):
                print(self.lst[ i * self.x + j ]," ",end="")
            print()
"""

class Matrice:
    def __init__(self,x,y):
        self.x = x
        self.y = y
        self.lst = []
        for i in range(y):
            self.lst.append( [0]*x ) 
                
    def get(self,x,y):
        return  self.lst[y][x]
        
    def set(self,x,y,val):
        self.lst[y][x] = val
    
    def afficher(self):
        for i in range(self.y):
            for j in range(self.x):
                print(self.lst[i][j]," ",end="")
            print()
                        
                
matrice = Matrice(5,5) 
matrice.afficher() 
matrice.set(1,1,5)
print(matrice.get(1,1))
print(matrice.get(0,0))
matrice.afficher()