Compilare: main.cpp: In function 'void dfs(int)': main.cpp:22:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i=0 ;i<gr[x].size();i ++){ | ~^~~~~~~~~~~~~ main.cpp: In function 'void dfst(int)': main.cpp:38:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i=0 ;i<gt[x].size();i++){ | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:79:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(int j=0;j<ctc.size();j++) | ~^~~~~~~~~~~ main.cpp:80:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 80 | {for(int k=0;k<ctc[j].size();k++) | ~^~~~~~~~~~~~~~