/in/foo.cc: In function 'int main()':
/in/foo.cc:9:19: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
 printf("%I64d",ans);
                   ^
/in/foo.cc:5:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d%d%d",&n,&m,&k);t=n;
                         ^