foo.cc: In function 'L Q(int&, int, int, int)':
foo.cc:2:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define md (x+y>>1)
             ~^~
foo.cc:10:45: note: in expansion of macro 'md'
 L q1=(x>M)?(P[P[R].l].s):(P[P[R].l].s+min(M,md*1ll)-x+1);
                                             ^~
foo.cc:2:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define md (x+y>>1)
             ~^~
foo.cc:12:30: note: in expansion of macro 'md'
 if(p<=q1)return Q(P[R].l,p,x,md);
                              ^~
foo.cc:2:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define md (x+y>>1)
             ~^~
foo.cc:13:22: note: in expansion of macro 'md'
 return Q(P[R].r,p-q1,md+1,y);
                      ^~
foo.cc: In function 'void C(int&, int, int, int, int)':
foo.cc:16:1: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
 if(!R)R=++nd;if(x==y){P[R].s+=v;return;}
 ^~
foo.cc:16:14: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
 if(!R)R=++nd;if(x==y){P[R].s+=v;return;}
              ^~
foo.cc:2:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define md (x+y>>1)
             ~^~
foo.cc:17:8: note: in expansion of macro 'md'
 if(nw<=md)C(P[R].l,nw,x,md,v);else C(P[R].r,nw,md+1,y,v);
        ^~
foo.cc:2:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define md (x+y>>1)
             ~^~
foo.cc:17:25: note: in expansion of macro 'md'
 if(nw<=md)C(P[R].l,nw,x,md,v);else C(P[R].r,nw,md+1,y,v);
                         ^~
foo.cc:2:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
 #define md (x+y>>1)
             ~^~
foo.cc:17:48: note: in expansion of macro 'md'
 if(nw<=md)C(P[R].l,nw,x,md,v);else C(P[R].r,nw,md+1,y,v);
                                                ^~
foo.cc: In function 'int main()':
foo.cc:23:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 int X,Y;scanf("%d%d",&X,&Y);
         ~~~~~^~~~~~~~~~~~~~

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