Compilare: user.cpp:45:0: warning: "mod" redefined [enabled by default] #define mod 4398042316799LL ^ user.cpp:39:0: note: this is the location of the previous definition #define mod 1000000009LL ^ user.cpp: In function ‘void dfs(int)’: user.cpp:80:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p[j]<d1[a[j]].size()&&d1[a[j]][p[j]]>d1[ma][p[pu]]) ^ user.cpp:104:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(p[j]<d0[a[j]].size()&&d0[a[j]][p[j]]>d0[ma][p[pu]]) ^ user.cpp: In function ‘int main()’: user.cpp:151:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d1[1].size()>=k) ^ user.cpp:156:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d0[1].size()>=k) ^