Compilare: user.cpp: In function ‘int main()’: user.cpp:20:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grupuri.in","r",stdin); ^ user.cpp:21:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grupuri.out","w",stdout); ^ user.cpp:22:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&k,&n); ^ user.cpp:24:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&v[i]),s=(s+v[i])*1LL; ^ user.cpp: In function ‘int gr(long long int)’: user.cpp:14:5: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (nr>=m*k*1LL) ^ user.cpp: In function ‘int main()’: user.cpp:14:5: warning: ‘nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:11:15: note: ‘nr’ was declared here long long nr; ^