Compilare: user.cpp: In function ‘i64 f(i64, int)’: user.cpp:48:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < pr.size() && pr[i] < lim && b != 1) { ^ user.cpp: In function ‘int main()’: user.cpp:63:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ user.cpp:78:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld%lld", &x, &y); ^ user.cpp: In function ‘i64 msqrt(i64, int)’: user.cpp:38:10: warning: ‘ant’ may be used uninitialized in this function [-Wmaybe-uninitialized] return ant; ^