View Compilation Error

0_0_33334427_11696.cpp: In function 'int main()':
0_0_33334427_11696.cpp:65:23: error: 'n' was not declared in this scope
     while(scanf("%d",&n) != EOF)
                       ^
0_0_33334427_11696.cpp:77:13: error: 'k' was not declared in this scope
         for(k=0; k<32; k++)
             ^