Compilare: main.cpp: In function 'void dfs_normal(int)': main.cpp:13:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for (int i=0;i<v[node].size();++i) { | ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int)': main.cpp:24:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int i=0;i<reversed[node].size();++i) { | ~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:56:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (j=0;j<ans[i].size();++j) { | ~^~~~~~~~~~~~~~ main.cpp:33:13: warning: unused variable 'k' [-Wunused-variable] 33 | int i,j,k,n,m,x,y,node,comp=0; | ^