/in/foo.cc: In function 'void build(int, int, int)':
/in/foo.cc:18:35: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  if(l==r){t[x]=l;return;}int mid=l+r>>1;
                                  ~^~
/in/foo.cc: In function 'void modify(int, int, int, int)':
/in/foo.cc:23:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(l==r)return;int mid=l+r>>1;
  ^~
/in/foo.cc:23:17: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  if(l==r)return;int mid=l+r>>1;
                 ^~~
/in/foo.cc:23:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  if(l==r)return;int mid=l+r>>1;
                         ~^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:52:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(int x:P)printf("%d ",x);puts("");
   ^~~
/in/foo.cc:52:31: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for(int x:P)printf("%d ",x);puts("");
                               ^~~~
/in/foo.cc:54:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   for(int x:Q)printf("%d ",x);puts("");
   ^~~
/in/foo.cc:54:31: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
   for(int x:Q)printf("%d ",x);puts("");
                               ^~~~