/in/foo.cc:2:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){int n;scanf("%d",&n),printf("%d\n",n+1>>1);return 0;}
      ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:2:44: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 main(){int n;scanf("%d",&n),printf("%d\n",n+1>>1);return 0;}
                                           ~^~