Eroare de compilare: user.cpp:12:10: error: redefinition of ‘long int b’ long n,m,b,i,p[123],sol[2000001],k,x1,x2,t1,t2,p1,p2; ^ user.cpp:10:6: error: ‘long int b’ previously defined here long b=73; ^ user.cpp: In function ‘int main()’: user.cpp:16:20: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(A,2000001,f1); ^ user.cpp:17:20: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(B,2000001,f1); ^