Compilare: user.cpp: In function ‘void aduna(char*, char*)’: user.cpp:18:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(r==1) {v1[0]++;v1[v1[0]]=1;} ^ user.cpp: In function ‘int main()’: user.cpp:35:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ex.in","r",stdin); ^ user.cpp:36:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ex.out","w",stdout); ^ user.cpp:38:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&k,&p); ^