0_0_19415374_25885.cpp: In function 'int main()':
0_0_19415374_25885.cpp:18:5: error: 'k' was not declared in this scope
k=pow((-1),(j+1));
^
0_0_19415374_25885.cpp: At global scope:
0_0_19415374_25885.cpp:28:1: error: expected unqualified-id before '--' token
------------------------
^
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