Compilare: user.cpp: In function ‘void ddfs(int)’: user.cpp:43:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[dad].size();i++){ ^ user.cpp: In function ‘void dfs(int)’: user.cpp:93:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[dad].size();i++){ ^ user.cpp: In function ‘void dfss(int)’: user.cpp:102:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[dad].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:113:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disconnect.in","r",stdin); ^ user.cpp:114:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disconnect.out","w",stdout); ^ user.cpp:115:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:118:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:129:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&type,&x,&y); ^