/in/foo.cc: In function 'int main()':
/in/foo.cc:11:25: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[10]' [-Wformat=]
         scanf("%s",&a[i]);
                         ^
/in/foo.cc:12:25: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[2]' [-Wformat=]
         scanf("%s",&b[i]);
                         ^