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n=int(input())
a=[int(n) for n in input().split(' ')]
k=list(set(a))
k=list(sorted(k))
t=0
print(a)
print(k)
for i in range(len(k)):
    if k[i] in a:
    	a.remove(k[i])
    	if (k[i]-1) in a:
        	a.remove(k[i]-1)
    	if (k[i]+1) in a:    
        	a.remove(k[i]+1)
		t=t+k[i]
    print(t)
    if(len(a)==0):
        break
print(t)
 
 
 

Traceback (most recent call last):
  File "/usr/lib/python3.5/py_compile.py", line 125, in compile
    _optimize=optimize)
  File "<frozen importlib._bootstrap_external>", line 735, in source_to_code
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "./prog.py", line 15
    t=t+k[i]
           ^
TabError: inconsistent use of tabs and spaces in indentation

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.5/py_compile.py", line 129, in compile
    raise py_exc
py_compile.PyCompileError: Sorry: TabError: inconsistent use of tabs and spaces in indentation (prog.py, line 15)

Standard output is empty