Wrong Answer
/in/foo.cc: In function 'void solve(int, int)':
/in/foo.cc:29:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=L+R>>1;
~^~
/in/foo.cc: In function 'void solve(int, int)':
/in/foo.cc:29:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
int mid=L+R>>1;
~^~
