Compilare: main.cpp: In function 'void dfs(int, int&, int&)': main.cpp:47:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:73:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();j++) ~^~~~~~~~~~~~ main.cpp:67:11: warning: unused variable 'nr' [-Wunused-variable] int i,nr,cc=0,nr1,nr2,s=0; ^~ main.cpp: In function 'void citire()': main.cpp:24:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.in","r",stdin); ^ main.cpp: In function 'int main()': main.cpp:87:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.out","w",stdout); ^