Compilare: main.cpp: In function 'void uniune(int, int)': main.cpp:73:5: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:77:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' ranc[aRoot]++; ^~~~ main.cpp: In function 'int read()': main.cpp:103:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp:87:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ main.cpp:95:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&z); ^ main.cpp: In function 'int main()': main.cpp:113:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(FIN,"r",stdin); ^ main.cpp:115:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT,"w",stdout); ^