Compilare: main.cpp:2: warning: ignoring '#pragma gcc optimize' [-Wunknown-pragmas] 2 | #pragma gcc optimize("O3") | main.cpp: In function 'void dfs(int)': main.cpp:12:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for(int i=0;i<g[a].size();i++){ | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:22:18: 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<gt[a].size();i++){ | ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(int j=0;j<cot[i].size();j++){ | ~^~~~~~~~~~~~~~