Compilare: main.cpp: In function 'void h_adun(int*, long long int)': main.cpp:24:11: warning: unused variable 'tr' [-Wunused-variable] int i,tr; ^~ main.cpp: In function 'int main()': main.cpp:48:9: warning: unused variable 'n' [-Wunused-variable] int n,i,cnt=0; ^ main.cpp:48:11: warning: unused variable 'i' [-Wunused-variable] int n,i,cnt=0; ^ main.cpp:48:13: warning: unused variable 'cnt' [-Wunused-variable] int n,i,cnt=0; ^~~ main.cpp:45:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("next.in","r",stdin); ^ main.cpp:46:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("next.out","w",stdout); ^ main.cpp:56:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&k); ^ main.cpp: In function 'void h_adun(int*, long long int)': main.cpp:33:22: warning: 'aux' may be used uninitialized in this function [-Wmaybe-uninitialized] a[++a[0]]=aux; ^ main.cpp: In function 'int main()': main.cpp:33:22: warning: 'aux' may be used uninitialized in this function [-Wmaybe-uninitialized] a[++a[0]]=aux; ^ main.cpp:25:15: note: 'aux' was declared here long long aux; ^~~