View Compilation Error

0_0_13899886_8756.cpp: In function 'int main()':
0_0_13899886_8756.cpp:23:7: error: 'i' was not declared in this scope
   for(i=0; i<N; i++)
       ^
0_0_13899886_8756.cpp: At global scope:
0_0_13899886_8756.cpp:70:1: error: expected unqualified-id before '--' token
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 ^