/in/foo.cc: In function 'int main()':
/in/foo.cc:34:20: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
     printf("%d",ans);
                    ^
/in/foo.cc:34:11: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
     printf("%d",ans);
     ~~~~~~^~~~~~~~~~