/in/foo.cc: In function 'int lulalalulalalulalulahei(int)':
/in/foo.cc:8:5: warning: unused variable 'i' [-Wunused-variable]
 int i=0;
     ^
/in/foo.cc: In function 'int lulalalulalalulalulalei(int)':
/in/foo.cc:28:11: warning: unused variable 'i' [-Wunused-variable]
 int ans=0,i=0;
           ^