Compilare: user.cpp: In function ‘int main()’: user.cpp:20:24: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] int st = 1 , dr = 1<<31 - 1 ; ^ user.cpp:18:9: warning: unused variable ‘n’ [-Wunused-variable] int n , s = 0 , g = 1 , mij , p ; ^ user.cpp:18:13: warning: unused variable ‘s’ [-Wunused-variable] int n , s = 0 , g = 1 , mij , p ; ^ user.cpp:19:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin , "%d" , &p ); ^