Compilare: user.cpp: In function ‘int main()’: user.cpp:26:61: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] sol = 1LL * sol + (1LL * 1 << strlen(s) - i - 1); ^ user.cpp:16:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:20:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); //getchar(); ^ /tmp/ccM9ZfRM.o: In function `main': user.cpp:(.text.startup+0x54): warning: the `gets' function is dangerous and should not be used.