Compilare: main.cpp: In function 'int main()': main.cpp:36:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(j=0; j<ctc[i].size(); j++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs1(int)': main.cpp:47:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for(i=0; i<G[x].size(); i++) | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:58:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for(i=0; i<tG[x].size(); i++) | ~^~~~~~~~~~~~~ main.cpp: In function 'void kosaraju()': main.cpp:65:11: warning: unused variable 'j' [-Wunused-variable] 65 | int i,j,x; | ^ main.cpp:65:13: warning: variable 'x' set but not used [-Wunused-but-set-variable] 65 | int i,j,x; | ^