Compilare: user.cpp: In function ‘void tarjan(int)’: user.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();++i) { ^ user.cpp: In function ‘void DFSdist(int)’: user.cpp:51:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<dag[x].size();++i) { ^ user.cpp: In function ‘int main()’: user.cpp:72:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[i].size();++j) { ^ user.cpp:82:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<res.size();++i) ^ user.cpp:85:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<res.size();++i) { ^ user.cpp:96:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ext[dist].size();++i) { ^ user.cpp:98:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<dag[x].size();++j) { ^ user.cpp:117:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<final.size();++i) fout<<final[i]<<' '; ^