Run id: 122552

Main.cc: In function 'int main()':
Main.cc:9:26: warning: left operand of comma operator has no effect [-Wunused-value]
     for(int i=0,j=len-1;i=0;i++,j--){
                          ^
Main.cc:10:30: error: 'pow' was not declared in this scope
      sum+=((a[j]-'0')*pow(2,i));
                              ^