Compilare: user.cpp: In function ‘int main()’: user.cpp:41:19: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(l>k) ^ user.cpp:8:11: warning: unused variable ‘s’ [-Wunused-variable] int k,s=0,n,m,i,j,x; ^ user.cpp:11:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:17:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x); ^