/in/foo.cc: In function 'int main()':
/in/foo.cc:50:29: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'LL* {aka long long int*}' [-Wformat=]
     scanf("%I64d%I64d",&n,&k);
                             ^
/in/foo.cc:50:29: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'LL* {aka long long int*}' [-Wformat=]
/in/foo.cc:90:25: warning: format '%d' expects argument of type 'int', but argument 2 has type 'LL {aka long long int}' [-Wformat=]
     printf("%I64d\n",ans);
                         ^