Compilare: user.cpp: In function ‘int main()’: user.cpp:52:9: warning: unused variable ‘m’ [-Wunused-variable] int m,i,j,x,p; ^ user.cpp:52:15: warning: unused variable ‘x’ [-Wunused-variable] int m,i,j,x,p; ^ user.cpp:53:15: warning: unused variable ‘ans’ [-Wunused-variable] long long ans=0; ^ user.cpp:50:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("indep.in","r",stdin); ^ user.cpp:51:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("indep.out","w",stdout); ^