Compilare: main.cpp: In function 'void dfsquery(long long int, long long int, long long int)': main.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<f[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<v[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp: In function 'void bfsupdate(long long int, long long int, long long int, long long int)': main.cpp:52:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<v[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp: In function 'void solve(long long int)': main.cpp:63:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<v[u].size();++i) ~^~~~~~~~~~~~ main.cpp: In function 'void dfssize(long long int, long long int)': main.cpp:76:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'long long int findcentroid(long long int, long long int, long long int)': main.cpp:87:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solveall(long long int)': main.cpp:102:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<v[C].size();++i) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:116:21: warning: unused variable 'j' [-Wunused-variable] long long n,m,i,j,t,k,cur=0,cnt=0; ^ main.cpp:116:23: warning: unused variable 't' [-Wunused-variable] long long n,m,i,j,t,k,cur=0,cnt=0; ^ main.cpp:116:25: warning: unused variable 'k' [-Wunused-variable] long long n,m,i,j,t,k,cur=0,cnt=0; ^ main.cpp:116:27: warning: unused variable 'cur' [-Wunused-variable] long long n,m,i,j,t,k,cur=0,cnt=0; ^~~ main.cpp:116:33: warning: unused variable 'cnt' [-Wunused-variable] long long n,m,i,j,t,k,cur=0,cnt=0; ^~~