Compilare: user.cpp: In function ‘int querry(int, int, unsigned int)’: user.cpp:7:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l<=d/2&&c<=d/2)return querry(l,c,d/2); ^ user.cpp:7:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l<=d/2&&c<=d/2)return querry(l,c,d/2); ^ user.cpp:8:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l<=d/2&&c>d/2)return querry(l,c-d/2,d/2)+d/2; ^ user.cpp:8:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l<=d/2&&c>d/2)return querry(l,c-d/2,d/2)+d/2; ^ user.cpp:9:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l>d/2&&c<=d/2)return querry(l-d/2,c,d/2)+d/2; ^ user.cpp:9:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l>d/2&&c<=d/2)return querry(l-d/2,c,d/2)+d/2; ^ user.cpp:10:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l>d/2&&c>d/2)return querry(l-d/2,c-d/2,d/2); ^ user.cpp:10:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l>d/2&&c>d/2)return querry(l-d/2,c-d/2,d/2); ^ user.cpp:11:1: warning: control reaches end of non-void function [-Wreturn-type] } ^