Compilare: user.cpp: In function ‘int main()’: user.cpp:50:20: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] while((1<<k+2)-1 <= i) ++k; ^ user.cpp:53:24: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] st = dr = (1<<k+1) - 1; ^ user.cpp:54:25: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] rest = i - (1<<k+2) + 1; ^ user.cpp:55:25: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] if(rest <= (1<<k+1)) st += rest; ^ user.cpp:57:24: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] st += (1<<k+1); ^ user.cpp:58:31: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] dr += rest - (1<<k+1); ^ user.cpp:43:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&N); ^