View Compilation Error

0_0_36632732_21496.cpp: In function 'int main()':
0_0_36632732_21496.cpp:50:7: error: redeclaration of 'int cnm'
   int cnm=sg(a[1]);
       ^
0_0_36632732_21496.cpp:49:7: note: 'int cnm' previously declared here
   int cnm=1;
       ^