Compilare: main.cpp: In function 'std::vector<int> SortareTopologica(int)': main.cpp:31:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < V[ x ].size(); ++i ) { ~~^~~~~~~~~~~~~~~ main.cpp:13:12: warning: unused variable 'j' [-Wunused-variable] int i, j, x; ^ main.cpp: In function 'int main()': main.cpp:61:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < Sortate.size(); ++i ) { ~~^~~~~~~~~~~~~~~~ main.cpp:50:15: warning: unused variable 'i' [-Wunused-variable] int n, m, i, j, x, y; ^ main.cpp:50:18: warning: unused variable 'j' [-Wunused-variable] int n, m, i, j, x, y; ^ main.cpp:47:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "sortaret.in", "r", stdin ); ^ main.cpp:48:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen( "sortaret.out", "w", stdout ); ^