Compilare: user.cpp: In function ‘long long unsigned int comb(int, int)’: user.cpp:10:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= m; i++) ^ user.cpp: In function ‘int main()’: user.cpp:23:27: warning: unused variable ‘rez’ [-Wunused-variable] unsigned long long x, y, rez; ^ user.cpp:24:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%llu", &x); ^ user.cpp:25:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%llu", &y); ^