Compilare: main.cpp: In function 'void dfsquery(int, int, int)': main.cpp:21:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<f[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp:24:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp: In function 'void bfsupdate(int, int, int, int)': main.cpp:52:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[pz].size();++i) ~^~~~~~~~~~~~~ main.cpp: In function 'void solve(int)': main.cpp:63:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[u].size();++i) ~^~~~~~~~~~~~ main.cpp: In function 'void dfssize(int, int)': main.cpp:76:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'int findcentroid(int, int, int)': main.cpp:87:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'void solveall(int)': main.cpp:102:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int 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; ^~~