Compilare: user.cpp: In function ‘void kruskal()’: user.cpp:57:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<muchii.size();i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:73:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<apm.size();i++) ^ user.cpp: In function ‘void citire()’: user.cpp:33:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ",&n,&m); ^ user.cpp:37:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d ",&a,&b,&c); ^ user.cpp: In function ‘int main()’: user.cpp:79:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in","r",stdin); ^ user.cpp:80:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out","w",stdout); ^