Compilare: main.cpp: In function 'void Kruskal(std::vector<muchie_struct>, int, int)': main.cpp:64:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned int i=0;i<m;i++) ~^~ main.cpp:77:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cnt==n-1)break; ~~~^~~~~ main.cpp: In function 'void citire_date(std::vector<muchie_struct>&, int&, int&)': main.cpp:15:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:18:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&aux.nod1,&aux.nod2,&aux.cost); ^ main.cpp: In function 'int main()': main.cpp:89:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("date.in","r",stdin); ^ main.cpp:90:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("date.out","w",stdout); ^ main.cpp: In function 'void Kruskal(std::vector<muchie_struct>, int, int)': main.cpp:71:9: warning: 'cnt' may be used uninitialized in this function [-Wmaybe-uninitialized] cnt++; ^