Compilare: user.cpp: In function ‘int main()’: user.cpp:157:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mostenire.in","r",stdin); ^ user.cpp:158:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mostenire.out","w",stdout); ^ user.cpp:160:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&n,&K); ^ user.cpp:163:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&v[i]); ^ user.cpp: In function ‘std::pair<long long int, long long int> DiffBinarySearch()’: user.cpp:41:43: warning: ‘sol’ may be used uninitialized in this function [-Wmaybe-uninitialized] ll need = (S * v[n] - D) * (indexNeed - 1) - S * sp[indexNeed - 1]; ^ user.cpp:19:34: note: ‘sol’ was declared here int64_t st = 1, dr = n, mij, sol; ^