Wrong Answer
/in/foo.cc: In function 'int main()': /in/foo.cc:55:6: warning: unused variable 'ans' [-Wunused-variable] int ans=0; ^~~
/in/foo.cc: In function 'int main()': /in/foo.cc:55:6: warning: unused variable 'ans' [-Wunused-variable] int ans=0; ^~~