Compilare: main.cpp: In function 'int cate(int, int, int, int)': main.cpp:28:18: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] idk = 1 << n - 1; ~~^~~ main.cpp: In function 'int main()': main.cpp:55:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d ", &cer, &n ); ^ main.cpp:69:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d ", &k ); ^ main.cpp:94:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &last ); ^ main.cpp:120:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &last ); ^