Compilare: user.cpp: In function ‘int cauta(int)’: user.cpp:7:13: warning: unused variable ‘m’ [-Wunused-variable] int k,i,m; ^ user.cpp: In function ‘void unire(int, int)’: user.cpp:15:9: warning: unused variable ‘k’ [-Wunused-variable] int k,i,m; ^ user.cpp:15:11: warning: unused variable ‘i’ [-Wunused-variable] int k,i,m; ^ user.cpp:15:13: warning: unused variable ‘m’ [-Wunused-variable] int k,i,m; ^ user.cpp: In function ‘int main()’: user.cpp:25:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disjoint.in","r",stdin); ^ user.cpp:26:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("disjoint.out","w",stdout); ^ user.cpp:27:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&m); ^ user.cpp:35:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&ct,&i,&j); ^