cuvinte.cpp: In function 'void AddEdge(int, int)': cuvinte.cpp:16: warning: unused variable 'i' cuvinte.cpp: In function 'void MinimumVertexCover(int)': cuvinte.cpp:69: warning: comparison between signed and unsigned integer expressions cuvinte.cpp: In function 'int main()': cuvinte.cpp:79: warning: unused variable 'k' cuvinte.cpp:77: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cuvinte.cpp:78: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cuvinte.cpp:80: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result