Compilare: main.cpp: In function 'void dfs(long long int)': main.cpp:83:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(/*loange loange*/ long long i=0;i<v[poz].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'bool verif()': main.cpp:96:35: warning: unused variable 'cnt' [-Wunused-variable] /*loange loange*/ long long i,cnt=0; ^~~ main.cpp: In function 'void euler(long long int)': main.cpp:114:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(/*loange loange*/ long long i=0;i<v[poz].size();++i) ~^~~~~~~~~~~~~~ main.cpp: In function 'char getch()': main.cpp:25:32: 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); ^ main.cpp: In function 'int main()': main.cpp:131:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.in","r",stdin); ^ main.cpp:132:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.out","w",stdout); ^