/in/foo.cc: In function 'int main()':
/in/foo.cc:6:24: warning: unused variable 'e' [-Wunused-variable]
  long long int a,b,c,d,e,x,y;
                        ^
/in/foo.cc:30:4: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if(y==t)
    ^~