Compilare: user.cpp: In function ‘int main()’: user.cpp:51:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v[nod].size(); i++){ ^ user.cpp:64:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < v[1].size(); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:21:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd%hd",&n,&k); ^ user.cpp:24:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd%hd",&a,&b); ^ user.cpp: In function ‘int main()’: user.cpp:34:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cezar.in","r",stdin); ^ user.cpp:35:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cezar.out","w",stdout); ^