Accepted
/in/foo.cc: In function 'void solve()':
/in/foo.cc:55:9: warning: unused variable 'u' [-Wunused-variable]
int u,v;
^
/in/foo.cc: In function 'void solve()':
/in/foo.cc:55:9: warning: unused variable 'u' [-Wunused-variable]
int u,v;
^
