Compilare: user.cpp: In function ‘int main()’: user.cpp:9:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%lld%lld", &n,&b); ^ user.cpp:13:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%lld", &k); ^ user.cpp:16:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%lld%lld", &s, &p); ^ user.cpp:41:33: warning: ‘pf’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(pf-2!=0) a[pf-2]++; ^ user.cpp:40:21: warning: ‘pi’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[pi]--; ^