Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:38:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < nodes[i].size(); j++) { ^ user.cpp: In function ‘int main()’: user.cpp:76:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < nodes[elem].size(); j++) { ^ user.cpp: In function ‘void citeste(int&)’: user.cpp:25:42: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poz=0; ^ user.cpp:31:42: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:46:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tribes.in", "r", stdin); ^ user.cpp:47:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("tribes.out", "w", stdout); ^