/in/foo.cc: In function 'int main()':
/in/foo.cc:11:33: warning: format '%s' expects argument of type 'char*', but argument 4 has type 'int' [-Wformat=]
  scanf("%s%s%s",&a[1],&b[1],c[1]);
                                 ^
/in/foo.cc:42:21: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'int' [-Wformat=]
   printf("%s",ans[1]);
                     ^