Compilare: main.cpp: In function 'int main()': main.cpp:9:23: warning: unused variable 'con' [-Wunused-variable] long long int a,b,con,i,j,st=0,dr=0,con1=0,mij=0,lp=0; ^~~ main.cpp:9:41: warning: unused variable 'con1' [-Wunused-variable] long long int a,b,con,i,j,st=0,dr=0,con1=0,mij=0,lp=0; ^~~~ main.cpp:7:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("difprim.in","r",stdin); ^ main.cpp:8:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("difprim.out","w",stdout); ^ main.cpp:10:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&a,&b); ^