Compilare: user.cpp: In function ‘void deleteR()’: user.cpp:41:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[i].size(); j++) ^ user.cpp: In function ‘void buildGraph()’: user.cpp:69:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[i].size(); j++) ^ user.cpp: In function ‘void Cuplaj()’: user.cpp:125:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Sol.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:134:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ar.out", "w", stdout); ^