/in/foo.c: In function 'main':
/in/foo.c:5:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
  scanf("%d%d",R1,s);
          ^
/in/foo.c:5:12: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int' [-Wformat=]
  scanf("%d%d",R1,s);
            ^
/in/foo.c:5:2: warning: 'R1' is used uninitialized in this function [-Wuninitialized]
  scanf("%d%d",R1,s);
  ^~~~~~~~~~~~~~~~~~
/in/foo.c:5:2: warning: 's' is used uninitialized in this function [-Wuninitialized]