Compilare: user.cpp: In function ‘void testCitire()’: user.cpp:38:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[ i ].size(); j++) ^ user.cpp: In function ‘void dfs(int)’: user.cpp:56:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[ nod ].size(); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:13:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:16:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&K[ i ]); ^ user.cpp:24:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int a, b; scanf("%d %d",&a,&b); ^ user.cpp: In function ‘int main()’: user.cpp:69:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerere.in","r",stdin); ^ user.cpp:70:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerere.out","w",stdout); ^