Compilare: user.cpp: In function ‘int kruskal()’: user.cpp:59:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < edges.size(); i++) { ^ user.cpp:75:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < rez.size(); i++) { ^ user.cpp:79:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int uni(int, int)’: user.cpp:55:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:83:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(FIN, "r",stdin); ^ user.cpp:84:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT,"w",stdout); ^ user.cpp:85:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n,&m); ^ user.cpp:89:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &e.x,&e.y,&e.cost); ^