Compilare: user.cpp: In function ‘int Rson(int)’: user.cpp:18:14: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] return x << 1 + 1; ^ user.cpp: In function ‘int main()’: user.cpp:77:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:80:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:84:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v); ^