Compilare: main.cpp: In function 'void dfs(int)': main.cpp:30:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i=0;i<v[x].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'void scc(int)': main.cpp:39:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int i=0;i<r[x].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:49:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int i=0;i<g[x].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'void bfs(int)': main.cpp:100:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | for(int i=0;i<g[x].size();i++){ | ~^~~~~~~~~~~~