Wrong Answer
/in/foo.cc: In function 'int main()': /in/foo.cc:36:20: warning: unused variable 'k' [-Wunused-variable] int left,right,k; ^
/in/foo.cc: In function 'int main()': /in/foo.cc:36:20: warning: unused variable 'k' [-Wunused-variable] int left,right,k; ^