/in/foo.cc: In function 'int main()':
/in/foo.cc:5:14: warning: unused variable 'p' [-Wunused-variable]
    5 |  int x,y,t,k,p,r,max,min;
      |              ^
/in/foo.cc:5:16: warning: unused variable 'r' [-Wunused-variable]
    5 |  int x,y,t,k,p,r,max,min;
      |                ^
/in/foo.cc:5:22: warning: unused variable 'min' [-Wunused-variable]
    5 |  int x,y,t,k,p,r,max,min;
      |                      ^~~
/in/foo.cc:5:12: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
    5 |  int x,y,t,k,p,r,max,min;
      |            ^