Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:34:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<drum[tata].size();i++) ^ user.cpp:29:15: warning: unused variable ‘temp’ [-Wunused-variable] int fiu,i,temp,cr=0; ^ user.cpp: In function ‘int main()’: user.cpp:85:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<rez[i].size();j++) ^ user.cpp:67:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.in","r",stdin); ^ user.cpp:68:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biconex.out","w",stdout); ^ user.cpp:69:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:72:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^