Compilare: main.cpp: In function 'int main()': main.cpp:46:42: warning: self-comparison always evaluates to true [-Wtautological-compare] if (val & ((1 << d) - 1) == ((1 << d) - 1)) { ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:46:42: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] main.cpp:27:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pluricex.out", "w", stdout) ; ^ main.cpp:29:44: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d %d", &n, &k, &d) ; ^ main.cpp:32:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &nr) ; ^ main.cpp:34:52: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &materie) ; ^