Compilare: user.cpp: In function ‘int main()’: user.cpp:106:46: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cumainilecurate.in", "r", stdin); ^ user.cpp:107:48: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cumainilecurate.out", "w", stdout); ^ user.cpp: In function ‘int Query(int)’: user.cpp:53:13: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(B[Sort[i + poz]].val <= val) ^ user.cpp:81:18: note: ‘val’ was declared here int sol = 0, val; ^