Semi Zero Matrix

def modifyMatrix(mat,R,C): 
    row = [0] * R  
    col = [0] * C  
    for i in range(0, R): 
        row[i] = 1
          

    for i in range(0, C) : 
        col[i] = 1
  
    for i in range(0, R) : 
          
        for j in range(0, C) : 
            if (mat[i][j] == 0) : 
                row[i] = 0
                col[j] = 0
              
    for i in range(0, R) : 
        for j in range(0, C): 
            if ( row[i] == 0 or col[j] == 0) : 
                mat[i][j] = 0
                  
def printMatrix(mat,R,C) : 
    for i in range(R): 
        for j in range(C) : 
            print(mat[i][j], end = " ") 
        print() 

R,C = map(int,input().split())
mat=[]
for i in range(R):
    mat.append(list(map(int,input().strip().split(' ')[0:C])))
    
modifyMatrix(mat,R,C) 
printMatrix(mat,R,C)