Compilare: user.cpp: In function ‘void Rsort()’: user.cpp:27:9: warning: unused variable ‘t’ [-Wunused-variable] int t,i,j,len; ^ user.cpp:27:13: warning: unused variable ‘j’ [-Wunused-variable] int t,i,j,len; ^ user.cpp:28:8: warning: unused variable ‘w’ [-Wunused-variable] el w; ^ user.cpp: In function ‘int Kasai()’: user.cpp:59:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:139:13: warning: unused variable ‘aux’ [-Wunused-variable] int sol,aux,i; ^ user.cpp:140:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("prefix2.in","r",stdin); ^ user.cpp:141:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("prefix2.out","w",stdout); ^ user.cpp:142:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", (a+1)); ^