/in/foo.cc: In function 'int main()':
/in/foo.cc:5:18: warning: unused variable 'x' [-Wunused-variable]
    long long int x,y,n,t=0;
                  ^
/in/foo.cc:5:20: warning: unused variable 'y' [-Wunused-variable]
    long long int x,y,n,t=0;
                    ^
/in/foo.cc:5:24: warning: unused variable 't' [-Wunused-variable]
    long long int x,y,n,t=0;
                        ^