/in/foo.cc: In function 'int main()':
/in/foo.cc:49:29: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
   printf("%d",a[n][b[n] - 1]);
                             ^
/in/foo.cc:51:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
    printf("%04d", a[n][i]);
                          ^