Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:41:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); ++i){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void cit(int&)': main.cpp:15:41: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,sizeof(char),DIM,stdin); ^ main.cpp:22:41: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff,sizeof(char),DIM,stdin); ^ main.cpp: In function 'int main()': main.cpp:77:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("berarii.in","r",stdin); ^ main.cpp:78:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("berarii.out","w",stdout); ^