Compilare: user.cpp:3:20: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define BUF_SIZE 1 << 14 ^ user.cpp:5:15: note: in expansion of macro ‘BUF_SIZE’ char bufw[1 + BUF_SIZE]; ^ user.cpp: In function ‘int main()’: user.cpp:31:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &k); ^