/in/foo.cc: In function 'int main()':
/in/foo.cc:16:1: error: expected ')' before 'cout'
 cout<<t-f[t/2];
 ^~~~
/in/foo.cc:6:21: warning: unused variable 'v' [-Wunused-variable]
 int f[1005],w[1005],v[1005],n,t=0;
                     ^